Methotrexate treatment of very high β-HCG ectopic pregnancy on previous cesarean scar: A case report

Ectopic pregnancy in a previous caesarean scar is a rare, potentially life-threatening situation that can cause massive bleeding and uterine rupture. Clinical symptoms can range from vaginal bleeding with or without pain, to uterine rupture with hypovolemic shock. Early diagnosis is possible by ultrasound examination, and it is very important because it leads to prompt management, improving maternal morbidity and mortality as well as future fertility. The current case report refers to a G3P2 woman with a history of 2 previous caesarean deliveries, who was diagnosed with an ectopic pregnancy on the caesarean scar using ultrasonography. The patient was treated with methotrexate both systemic and into the sac, as well as with injection into the sac of 5mEq potassium chloride. The woman was followed up until measurements of serum β-Human Chorionic Gonadotropin were within nonpregnant levels. There is no clear-cut best way to handle cesarean scar pregnancy. Pregnancy with a cesarean scar should be identified and treated as soon as possible in order to avoid serious problems and preserve fertility. However, even more advanced cesarean scar pregnancies can be managed conservatively at first, when a highly expertized team in a tertiary hospital is available.

The role of endometrial scratching prior to in vitro fertilization: an updated systematic review and meta-analysis

RESEARCH QUESTION

To evaluate the role of endometrial scratching performed prior to an embryo transfer cycle on the probability of pregnancy compared to placebo/sham or no intervention.

DESIGN

A computerized literature (using a specific search strategy) search was performed across the databases MEDLINE, EMBASE, COCHRANE CENTRAL, SCOPUS and WEB OF SCIENCE up to June 2023 in order to identify randomized controlled trials (RCTs) evaluating the effect of endometrial scratching prior to an embryo transfer cycle on the probability of pregnancy, expressed either as live birth, ongoing pregnancy or clinical pregnancy (in order of significance) compared to placebo/sham or no intervention. Data were pooled using random-effects or fixed-effects model, depending on the presence or not of heterogeneity. Heterogeneity was assessed using the I2 statistic. Subgroup analyses were performed based on the population studied in each RCT, as well as on the timing and method of endometrial biopsy. Certainty of evidence was assessed using the GRADEPro tool.

RESULTS

The probability of live birth was significantly higher in embryo transfer cycles after endometrial scratching as compared to placebo/sham or no intervention (relative risk-RR: 1.12, 95% CI: 1.05-1.20; heterogeneity: I2=46.30%, p<0.001, 28 studies; low certainty). The probability of ongoing pregnancy was not significantly difference between the two groups (RR: 1.07, 95% CI: 0.98-1.18; heterogeneity: I2=27.44%, p=0.15, 11 studies; low certainty). The probability of clinical pregnancy was significantly higher in embryo transfer cycles after endometrial scratching as compared to placebo/sham or no intervention (RR: 1.12, 95% CI: 1.06-1.18; heterogeneity: I2=47.48%, p<0.001, 37 studies; low certainty). A subgroup analysis was performed based on the time that endometrial scratching was carried out. When endometrial scratching was performed during the menstrual cycle prior to the embryo transfer cycle a significantly higher probability of live birth was present (RR: 1.18, 95% CI:1.09-1.27; heterogeneity: I2=39.72%, p<0.001, 21 studies; moderate certainty). On the contrary, no effect on the probability of live birth was present when endometrial injury was performed during the embryo transfer cycle (RR: 0.87, 95% CI: 0.67-1.15; heterogeneity: I2=65.18%, p=0.33, 5 studies; low certainty). In addition, a higher probability of live birth was only present in women with previous IVF failures (RR: 1.35, 95% CI: 1.20-1.53; heterogeneity: I2=0%, p<0.001, 13 studies; moderate certainty) with evidence suggesting that the more IVF failures the more likely endometrial scratching to be beneficial (p=0.004). The number of times endometrial scratching was performed, as well as the type of instrument used did not appear to affect the probability of live birth.

CONCLUSIONS

Endometrial scratching during the menstrual cycle prior to an embryo transfer cycle can lead to a higher probability of live birth in patients with previous IVF failures.

PROSPERO REGISTRATION

PROSPERO CRD42023433538 (18 Jun 2023).

The importance of follicular flushing in optimizing oocyte retrieval

PURPOSE OF REVIEW

To critically evaluate the use of follicular flushing during oocyte retrieval.

RECENT FINDINGS

The latest meta-analysis evaluating follicular flushing does not favour its use over single aspiration. The randomized controlled trials (RCTs) included, however, are characterized by significant heterogeneity regarding the population analysed, the needle type and lumen used, the aspiration pressure applied and the number of flushing attempts performed. More importantly, information regarding the flow rate used for aspiration is scarce. The only RCT employing a constant flow rate between single aspiration and follicular flushing in women with monofollicular development, suggests that a higher number of oocytes is retrieved after follicular flushing.

SUMMARY

In order to eliminate clinical heterogeneity that might obscure the detection of the true effect of follicular flushing, randomization to single aspiration and follicular flushing should occur within the same patient. This can be achieved by randomly allocating each patient's ovary to either single aspiration or follicular flushing, maintaining similar flow rates between the groups compared.Given the importance of maximizing the number of oocytes retrieved from a given number of follicles developed, the conduction of properly designed RCTs evaluating follicular flushing is certainly required.

The Impact of Coronavirus Disease 2019 Pandemic on Female Patients Seeking or Undergoing Fertility Treatment in a Single In vitro Fertilisation Clinic in Greece: An International, Cross-sectional Study

Background

The temporary delay in fertility treatments due to the coronavirus disease 2019 (COVID-19) pandemic, in combination with the imposed lockdowns, has created psychological distress and anxiety amongst infertile patients.

Aims

The aim of this study was to evaluate how the pandemic has influenced assisted reproduction technology (ART) patients in Greece, during the second wave of the pandemic. An additional aim was to examine the effects of the pandemic on cross-border patients in particular, compared to national ones.

Settings and Design

This study was a cross-sectional, questionnaire-based study, distributed to 409 patients of a single in vitro fertilisation (IVF) clinic in Greece, during the period between January until the end of April 2021.

Materials and Methods

The survey was conducted online via E-mail and was distributed to national and international female patients of a single IVF clinic in Greece, who were undergoing ART treatment during the second wave of the COVID-19 pandemic. Patient participation was anonymous, and participants provided informed consent for collection and publication of data.

Statistical Analysis Used

The mean values of baseline characteristics, along with answer percentages per questionnaire item, were calculated. Collected data were cross-tabulated, and the Chi-square test was used as a measurement of the differences between national and cross-border patients. A P value lower than 0.05 was considered statistically significant. All analyses were conducted using the SPSS Statistics software.

Results

From 409 initial candidates, 106 women, with a mean age of 41.2 years, completed the questionnaire (26% response rate). The majority of national patients did not experience any delays in their fertility plans (62%), while cross-border patients experienced over 6 months of delays (54.7%). The main reason for fertility postponement was travel restrictions due to COVID-19 for cross-border patients (62.5%), while national patients cited additional reasons. The majority of patients experienced a degree of stress (65.2%) due to the delays, however were not fearful of COVID-19 infection (54.7%). Most patients were aware of the protective measures taken by IVF clinics (80.2%), and this was a determinant factor (71.7%) for their decision to restart their fertility treatment.

Conclusion

The COVID-19 pandemic lockdowns had a significant emotional impact on patient receiving or undergoing ART treatment in Greece. This impact was more pronounced on cross-border patients. This highlights the need for continuation of ART care, with the appropriate protective measures, during the pandemic, as well as during similar times of crisis in the future.

P-706 Improved prediction of the number of oocytes retrieved using automated-3D ultrasound compared to manual-2D ultrasound on the day of triggering final oocyte maturation

Study question

Does the number of follicles ≥11mm differ when measured by manual-2D or automated-3D ultrasound and which method predicts the number of oocytes collected more accurately?

Summary answer

Manual-2D and automated-3D ultrasound find similar numbers of follicles ≥11mm. Automated-3D ultrasound has a higher predictive ability regarding the number of oocytes collected.

What is known already

Accurate assessment of the size and number of follicles during ovarian stimulation is important to determine the optimum day of triggering final oocyte maturation and subsequent oocyte retrieval, in order to achieve the maximum number of mature oocytes. Moreover, the number of follicles ≥11mm on the day of triggering final oocyte maturation, has been used as a criterion to identify women at risk of Ovarian Hyperstimulation Syndrome.

Automated-3D ultrasound follicle size and count measurement has been proposed as a valid alternative to 2D ultrasound measurement, but its predictive ability regarding number of oocytes collected has not been compared.

Study design, size, duration

Prospective observational cohort study performed between 12/2020 and 07/2021 in a single ART center including 93 women undergoing COS. On the day of triggering final oocyte maturation, 3D-ultrasound (SonoAVC;GE Medical Systems) and traditional 2D-ultrasound were used to assess the number and size of follicles.

Participants/materials, setting, methods

Patients underwent ovarian stimulation with recombinant-FSH and GnRH antagonists. Triggering of final oocyte maturation was performed when three follicles ≥17mm were present on 2D ultrasound.

The number of follicles ≥11mm assessed with manual-2D and automated-3D ultrasound on the day of triggering was compared. Linear regression analysis was performed with dependent variable the number oocytes retrieved and independent variables the number of follicles ≥11mm (2D-ultrasound) as well as the number of follicles ≥11mm (automated-3D ultrasound).

Main results and the role of chance

The median number of follicles ≥11mm counted via automated-3D [ 10 (IQR: 5.75 – 16)] and the median number of follicles ≥11mm found via manual-2D assessment [10 (IQR: 6.75 – 18)] was similar between the two groups. Τhe median number of oocytes retrieved was 12 (IQR: 6.75 – 18). A high correlation of R = 0.915 was observed between the number of follicles found to be ≥ 11mm via automated-3D and 2D.

However, regarding the number of oocytes collected, the predictive ability of automated-3D, was found to be, significantly higher (R2=0.837) than the predictive ability of 2d-ultrasound (R2=0.734) when all follicles ≥11mm were taken into account. These findings suggest that while the number of follicles measured to be ≥ 11mm was similar in both methods, automated 3D-ultrasound measurement offers a higher ability to predict the number of oocytes retrieved, compared to manual 2D-ultrasound measurements.

Limitations, reasons for caution

The present study compared manual 2D and automated 3D-ultrasound follicle measurements in the general IVF population. Future studies using a larger patient population will be useful to determine any potential differences between the two methods in patients stratified according to ovarian response.

Wider implications of the findings

Manual 2D and automated 3D-ultrasound assessment provide similar measurements of follicle number and size in patients undergoing IVF but automated-3D measurements offer greater predictive value regarding the number of oocytes collected and can be used effectively to monitor follicular development during ovarian stimulation for IVF.

Trial registration number

N/A

P-702 Prediction of oocyte maturity via automated volumetric follicle measurements on the day of triggering final oocyte maturation. An observational cohort study

Study question

Can automated measurements of follicular volume by three-dimensional (3D) ultrasound predict the number of mature oocytes retrieved better than two-dimensional (2D) measurements of follicles?

Summary answer

Automated measurements of follicular volume by 3D ultrasound have similar predictive ability of the number of mature oocytes retrieved as manual 2D measurements of follicles.

What is known already

Accurate assessment of the size and number of follicles during ovarian stimulation is important to determine the day of triggering final oocyte maturation and subsequent oocyte retrieval, in order to achieve the optimal number of mature oocytes. Follicles with a diameter ≥11mm on the day of triggering are often considered to contribute the most towards the final number of mature oocytes. It has also been shown that 3D follicle volumes offer a more physiological measurement and may be a more objective than 2D follicle diameters. However, to date, the correlation between diameters and volumes has not been properly evaluated.

Study design, size, duration

Prospective observational cohort study of 75 women undergoing ICSI between 01/2021 and 09/2021 in a private ART centre. In each patient, two dimensional-2D and three dimensional-3D transvaginal ultrasound (SonoAVC; GE Medical Systems), was used to assess differences in the number and size of follicles on the day of triggering final oocyte maturation. SonoAVC automatically calculates the volume of the follicle while manual-2D value is calculated as the mean of the maximal follicular dimensions x-y.

Participants/materials, setting, methods

Patients underwent ovarian stimulation with recombinant-FSH and GnRH antagonists. Statistical analysis involved robust linear regression with dependent variable the number MIIs retrieved and independent variables the number of follicles ≥11mm (via 2D) and the number of follicles with volume ≥0.7ml (via SonoAVC). 0.7ml was used as it is a close approximation to the volume of a sphere with diameter 11mm. This was confirmed by identifying the actual volume of aspirated follicles 11mm (unpublished data).

Main results and the role of chance

A high correlation of R = 0.922 was observed between manual-2D and automated-3D assessment in the number of follicles with volume ≥0.7ml and those with mean diameter ≥11mm. In addition, no differences were found in the number of follicles with volume ≥0.7ml vs the number of follicles with diameter of ≥ 11mm (median 9.0, IQR: 5.0 – 14.5 vs. median 10.0, IQR: 6.75 – 18, respectively) on the day of triggering final oocyte maturation. The median number of MIIs collected was 9.0 (IQR: 5.0 – 13.25).

The predictive capability of follicles with volume ≥0.7ml in regards to the number of MII collected was found to be R2=0.736, which is higher than the predictive capability of follicles ≥11mm (R2=0.629). These findings suggest that the number of follicles with a volume ≥0.7ml offers at least a similar predictive capability as the traditionally used number of follicles ≥11mm.

Limitations, reasons for caution

While the volume of 0.7ml was found to be closely correlated with the size of 11mm, the predictive capability of other follicular volumes needs to also be compared, since follicles are rarely spheres, especially in hyperstimulated ovaries and therefore even better prediction of oocyte maturation may arise from another volume.

Wider implications of the findings

Manual-2D ultrasound and automated-3D volumetric assessment of follicles provide similar predictive value of the number of mature oocytes retrieved. Therefore volumetric measurements can possibly be used during assessment of ovarian stimulation, instead of mean diameter. However, their clinical effectiveness needs to be tested in a robust clinical trial.

Trial registration number

N/A

P-613 Association between basal androgen concentrations and number of follicles on the day of triggering final oocyte maturation in poor responders undergoing IVF; A prospective study

Study question

Are basal androgen concentrations associated with the number of follicles on the day of triggering final oocyte maturation in poor responders undergoing in vitro fertilization (IVF)?

Summary answer

A significant negative association is present between (dehydroepiandrosterone sulfate) DHEAS concentrations and the number of follicles on the day of triggering final oocyte maturation.

What is known already

Studies in animals have shown that androgens promote early follicular development and granulosa cell proliferation, by augmenting follicle-stimulating hormone (FSH) receptor expression in granulosa cells. Several retrospective studies have evaluated the association between basal androgen concentrations and follicular development in normal and poor responders undergoing ovarian stimulation for IVF with conflicting results.

Study design, size, duration

This prospective study was performed between 02/2020 and 01/2022 in 103 poor responders according to the Bologna criteria. Androgens, including total testosterone, sex hormone-binding globulin (SHBG), dehydroepiandrosterone sulfate (DHEAS), Δ4-androstenedione and 17-OH progesterone (17-OHP), were measured at the initiation of ovarian stimulation, using the automated Elecsys immunoanalyser (Roche Diagnostics, Mannheim, Germany). Ovarian stimulation was performed using a fixed dose of 300 IU of recombinant gonadotrophins and gonadotrophin-releasing hormone (GnRH) analogues.

Participants/materials, setting, methods

Triggering of final oocyte maturation was performed in the presence of three follicles of ≥ 17mm. The primary outcome measure was the number of follicles ≥11mm on the day of triggering final oocyte maturation. The association between androgen concentrations and the number of follicles ≥11mm on the day of triggering was evaluated using generalized estimating equations, accounting for female age and body mass index (BMI). Values were expressed as coefficient (coef) or mean (95% confidence interval).

Main results and the role of chance

Female age was 41.9 (41.2-42.6) years, while BMI was 26.1 (24.9-27.3) kg/m2. The duration of ovarian stimulation was 10.3 (9.7-10.8) days and the total dose of gonadotrophins required was 3058 (2903-3213) IU. The number of follicles ≥11 mm on the day of triggering final oocyte maturation was 6.1 (5.3-7.0). The number of COCs retrieved was 3.9 (3.2-4.6), the number of MII oocytes was 3.4 (2.8-3.9) and the number of 2pn oocytes was 2.5 (2.1-2.8).

No significant association was found between basal testosterone (coef: -0.008, -0.019 to + 0.003, p = 0.17), 17-OHP (coef: -0.044, -0.391 to + 0.303, p = 0.80), SHBG (coef: -0.002, -0.007 to + 0.002, p = 0.25) Δ4-androstenedione (coef: -0.101, -0.306 to + 0.104, p = 0.33) concentrations and the number of follicles ≥11mm on the day of triggering final oocyte maturation. In contrast, a significant negative association was found between basal DHEAS (coef: -0.011, -0.019 to -0.003, p = 0.007) concentrations and the number of follicles ≥11 mm on the day of triggering final oocyte maturation. Higher DHEAS concentrations were associated with the development of fewer follicles ≥11 mm.

Limitations, reasons for caution

This prospective study evaluated the association between basal androgen concentrations and the number of follicles on the day of triggering final oocyte maturation in poor responders stimulated with a fixed dose of recombinant FSH. However, the precision of the estimates could be increased by analyzing a larger study population.

Wider implications of the findings

DHEA supplementation in poor responders undergoing IVF has not been shown to improve ovarian response. Given the significant negative association between DHEAS concentrations and the number of follicles on the day of triggering final oocyte maturation, future studies on DHEA supplementation should consider basal DHEAS concentrations.

Trial registration number

N/A

O-127 Higher probability of live birth after testosterone pretreatment in women with poor ovarian response undergoing IVF: a systematic review and meta-analysis

Study question

Does testosterone pretreatment increase the probability of pregnancy in poor responders undergoing ovarian stimulation with gonadotrophin-releasing hormone (GnRH) analogues and gonadotrophins for in-vitro fertilization (IVF)?

Summary answer

Testosterone pretreatment increases clinical pregnancy and live birth rates in poor responders undergoing ovarian stimulation for IVF.

What is known already

Androgens have been shown to stimulate early stages of follicular growth, increase the number of primary, pre-antral and antral follicles as well as increase ovarian sensitivity to follicle stimulating hormone (FSH). Although androgen supplementation has been evaluated in several randomized controlled trials (RCTs) and meta-analyzed in six systematic reviews until today currently no solid conclusions can be drawn regarding its effectiveness.

Study design, size, duration

A literature search was performed until September 2021 aiming to identify RCTs evaluating testosterone pretreatment in poor responders. Outcome measures included achievement of pregnancy, total dose of gonadotrophins required, duration of stimulation, estradiol levels, endometrial thickness and number of follicles ≥17 mm on the day of triggering final oocyte maturation, number of cumulus–oocyte complexes (COCs) retrieved, embryos transferred, metaphase II (MII) and 2-pronuclei oocytes (2pn) and the proportion of patients having an embryo transfer (ET).

Participants/materials, setting, methods

Eight RCTs published between 2006 and 2021 were analyzed, including 760 women. Pretreatment with transdermal testosterone gel was performed in all studies with a dose ranging from 10 to 12.5 mg/day for 10 to 56 days. In dichotomous data, estimates were expressed as risk ratio (RR) with 95% confidence intervals (CIs), using the fixed or random effects method. In continuous data, differences were pooled across resulting in a weighted mean difference (WMD) with 95% CI.

Main results and the role of chance

Testosterone pretreatment was associated with a significantly higher live birth (RR: 2.07, 95%CI: 1.09 to 3.92) and clinical pregnancy rate (RR: 2.25, 95%CI: 1.54) in women with POR undergoing IVF, while there was also a significant increase in the number of COCs retrieved (WMD: +0.88, 95% CI: +0.22 to + 1.54). Significantly less days to complete ovarian stimulation (WMD: -0.81 days, 95% CI: -1.46 to −0.16), a lower total dose of gonadotrophins (WMD: -368.8 IUs, 95% CI: −612.4 to -125.2), a thicker endometrium on the day of triggering final oocyte maturation (WMD: +0.83 mm, 95% CI: +0.13 to + 1.53) and a lower cancellation rate due to poor ovarian response (RR: 0.37, 95%CI: 0.20 to 0.71) were observed. No significant differences were observed in estradiol levels (WMD: -8.12 pg/mL, 95% CI: -118.2 to + 101.96), in the numbers of follicles ≥17 mm on the day of triggering final oocyte maturation (WMD: +0.82, 95%CI: -0.11 to + 1.74), of MII oocytes (WMD: +0.50, 95% CI: -0.17 to + 1.17),  of 2pn oocytes (WMD: +0.49, 95% CI: -0.11 to + 1.10), of embryos transferred (WMD: +0.21, 95%CI: -0.07 to + 0.49) and in the proportion of patients with ET (RR: 1.00, 95% CI: 0.96 to 1.04).

Limitations, reasons for caution

The definition of poor ovarian response varied among studies and a considerable heterogeneity regarding the type, dose and duration of testosterone pretreatment was present. Although the present study is currently the largest meta-analysis evaluating testosterone pretreatment, the total number of patients is still not large enough to draw solid conclusions.

Wider implications of the findings

The current study suggests that the probability of pregnancy is increased in poor responders pretreated with transdermal testosterone. This increase, in the absence of other proven beneficial interventions in these patients, justifies the conduction of further relevant RCTs.

Trial registration number

CRD42021262098

O-174 The association of chromosomal abnormalities with embryo ultrastructure, spindle anomalies and metabolic profiling

Study question

Can metabolic profiling predict embryos at risk of chromosomal abnormalities and how are these reflected in the ultrustructure and cytoskeleton?

Summary answer

Different metabolic profiles are observed between normal and aneuploid/chaotic embryos which are linked to altered mitochondrial and other organelles’ structure/function and spindle and nuclear abnormalities.

What is known already

One of the greatest challenges in IVF is the selection of the best ‘fit’ embryo for implantation in a non-invasive way. Down’s syndrome embryos and Monosomy 21 embryos have previously been shown to have differential expression of metabolites compared to normal embryos, but limited studies, have investigated in detail the metabolic profiling of embryos with other abnormalities in comparison to chromosomally normal embryos or their reflection in the ultrustructure and the cytoskeleton.

Study design, size, duration

Culture media collected on day 3 from 200 embryos which underwent PGT-A, were analysed by hydrophilic interaction liquid chromatography tandem mass spectrometry (HILIC-MS/MS). The chromosomally normal embryos were transferred to the uterus (1–2 embryos/ET) or still remain vitrified for clinical use and 120 of the embryos that were diagnosed with chromosomal abnormalities were either processed for spindle/chromosome configurations analysis (n = 60) by confocal laser scanning microscopy(CLSM) or for ultrastructural analysis (n = 60) by Transmission Electron Microscopy(TEM).

Participants/materials, setting, methods

Metabolic profiling was conducted in a Forensic Toxicology Laboratory by HILIC-MS/MS (100 metabolites). Spindle Chromosome Configuration analysis was conducted in an academic hospital after methanol fixation and immunostaining with α-tubulin, γ-tubulin, acetylated-tubulin antibodies and DAPI or/ PI to visualise DNA. Ultrastructure analysis by TEM was carried out in a Histology/Embryology Laboratory following embryo fixation in 3% glutaraldehyde, 1% osmium tetroxide, washes in  PBS and staining with 1% aqueous uranyl acetate.

Main results and the role of chance

This  study provides screening  for &gt;100 primary metabolites using HILIC-MS/MS in a single run of 40 minutes. Characteristic patient specific metabolic profiles were observed which differed between normal embryos that had resulted in a viable pregnancy and aneuploid and chaotic embryos. Logistic regression analysis revealed a number of metabolites that had a high predictive value including Isoleucine,  lysine and glucose and models were created in combination with embryo score which in the future could serve as non-invasive markers for the detection of chromosomal abnormalities before embryo transfer. TEM analysis revealed differences in the quality of cells and organelle activity which were reflected in the embryo metabolic profiles. Chaotic poor quality embryos showed a lower number of mitochondria, often with no cisternae, increased number of vacuoles, and frequently problems in junctions between cells. Aneuploid but well developed hatching blastocysts had mainly cells with good mitochondrial morphology/ activity, nice Golgi apparatus and well developed rough and smooth endoplasmic reticulum but depending on the aneuploidy involved, inner cell mass cells with limited organelles and occasionally lipofuscin droplets in the trophectoderm were evident. Nuclear and chromosomal abnormalities were interrelated through abnormalities in cytokinesis and spindle formation and reflected in the embryo metabolic profiles.

Limitations, reasons for caution

Although metabolic profiles were compared between normal and chromosomally abnormal embryos identified by PGT-A, all the  normal embryos were transferred to the uterus or remain vitrified for clinical purposes and therefore the ultrastructure analysis and the spindle chromosome configuration analysis are based only on chromosomally abnormal embryos.

Wider implications of the findings

This study identified distinct differences in the metabolic profiles of normal and chromosomally abnormal embryos and provides unique metabolites which in the future could serve as non-invasive biomarkers for the detection of chromosomal abnormalities before embryo transfer.

Trial registration number

not applicable

P-608 A higher probability of ongoing pregnancy is present by using the fixed as compared to the flexible GnRH antagonist protocol

Study question

Is the probability of ongoing pregnancy higher in the fixed as compared to the flexible gonadotrophin releasing hormone (GnRH) antagonist protocol?

Summary answer

A higher probability of ongoing pregnancy is present by using the fixed as compared to the flexible GnRH antagonist protocol.

What is known already

Although fixed GnRH antagonist initiation is a simpler protocol that requires less monitoring compared to the flexible one, the latter might avoid unnecessary antagonist use, by administering GnRH antagonist only when there is a real risk for premature luteinizing hormone (LH) rise. A meta-analysis of four randomised controlled trials (RCTs) published in 2005, comparing fixed versus flexible GnRH antagonist administration, showed a lower non-significant probability of clinical pregnancy in the flexible compared with the fixed protocol. Following that meta-analysis, four additional RCTs comparing the fixed versus the flexible GnRH antagonist protocol have been performed necessitating an update on this topic.

Study design, size, duration

A literature search was performed until 12/2021, in order to identify RCTs comparing the fixed versus the flexible GnRH antagonist protocol in patients undergoing ovarian stimulation for in-vitro fertilization (IVF) using gonadotrophins. The main outcome measure was achievement of ongoing pregnancy. Secondary outcome measures included duration of stimulation, incidence of premature LH rise, estradiol levels on the day of triggering final oocyte maturation and the number of cumulus-oocyte-complexes (COCs) retrieved.

Participants/materials, setting, methods

Seven RCTs comparing fixed versus flexible protocol, published between 2002 and 2021, were identified (1007 patients). A meta-analysis was performed using the fixed or random effects method depending on the presence of statistically significant heterogeneity. For dichotomous data, estimates were expressed as risk ratio (RR) with 95% confidence intervals (CIs). For continuous data, differences were pooled across resulting in a weighted mean difference (WMD) with 95% CI.

Main results and the role of chance

Ovarian stimulation was performed using recombinant gonadotrophins in all studies. In the fixed protocol initiation of GnRH antagonist was performed either on Day 6 (six studies) or on Day 5 (single study) of stimulation. In the flexible protocol antagonist was initiated using either ultrasound criteria (four studies) or by combination of ultrasound or hormonal criteria (three studies).

No significant difference was present between the fixed and flexible groups in the duration of gonadotrophin stimulation (WMD:+0.23 days, 95% CI: -0.08 to + 0.53, random protocol) and in the incidence of premature LH rise (RR:0.86, 95% CI: 0.48-1.53, fixed protocol). Significantly lower estradiol levels were present on the day of triggering final oocyte maturation (WMD:-237.74, 95% CI: -463.87 to -11.61, random protocol) and significantly less COCs were retrieved (WMD:-1.83, 95% CI: -3.11 to -0.54, random protocol) in the fixed compared with the flexible protocol.

A significantly higher probability of ongoing pregnancy was observed in the fixed as compared to the flexible protocol, both per intention to treat (RR:1.28, 95% CI: 1.02-1.61, I2:0%, fixed protocol, six studies, 898 patients) as well as per protocol analysis (RR:1.30, 95% CI: 1.04-1.62, I2:0%, fixed protocol, six studies, 757 patients).

Limitations, reasons for caution

In the current meta-analysis, the number of studies and patients included does not allow to perform subgroup analyses based on the time of fixed antagonist initiation or on the criteria used for flexible antagonist initiation.

Wider implications of the findings

Although in theory flexible antagonist initiation is an attractive protocol that leads to less antagonist administration, the current meta-analysis suggests that it is associated with a lower probability of ongoing pregnancy. Further RCTs examining the two antagonist protocols for additional outcomes, including live birth or cumulative live birth, are necessary.

Trial registration number

N/A

Effects of Different Drug Therapies and COVID-19 mRNA Vaccination on Semen Quality in a Man with Ankylosing Spondylitis: A Case Report

Background and Objectives: Ankylosing spondylitis (AS) is a condition that affects 0.1% to 0.5% of the adult population. The aim of this case report was to investigate the possible effects of the drugs taken for treatment of AS as well as mRNA vaccination for COVID-19 on semen quality by performing a highly detailed analysis. Materials and Methods: Sperm characteristics were examined by light microscopy, DNA fragmentation (DFI) was analysed by flow cytometry and morphology was evaluated by transmission electron microscopy (TEM). Results: Semen analysis under therapy with (1) celecoxib and sulphasalazine showed: concentration 47 million/mL, 53% progressive motility, 7% normal morphology and 9.6% DFI, (2) Golimumab and before mRNA Vaccination showed: concentration 108 million/mL, 82% progressive motility, 1% normal morphology and 7.6% DFI, and (3) Golimumab and after 3 doses of mRNA Vaccination showed: concentration 142 million/mL, 85% progressive motility, 1% normal morphology and 6.8% DFI. TEM revealed head, neck and tail abnormalities, as well as the presence of cells with incomplete spermiogenesis white cells and phagocytes in the sample under therapy with celecoxib and sulphasalazine. Golimumab treatment lead to an increased incidence of elongated heads but in general reduced inflammation as no white cells were evident in TEM. Conclusion: The anti-inflamatory drugs celecoxib and sulphasalazine had no adverse effect on sperm quality as all parameters were within normal limits and the patient achieved under that treatment 2 pregnancies following natural conception that lead to the birth of a healthy boy and girl respectively. Anti-TNFa treatment with Golimumab exerted a negative effect on morphology but not on concentration, motility and DFI. After 3 doses of mRNA Vaccination, sperm concentration increased while motility, morphology and DFI remained similar to the values before vaccination suggesting no negative effect of the mRNA vaccine for COVID-19 on sperm quality.

Multidose methotrexate treatment of cornual pregnancy after in vitro fertilization: Two case reports

Background

An ectopic pregnancy, when the gestational sac is implanted outside of the uterine cavity, can be life-threatening. A cornual pregnancy is the most dangerous type of ectopic pregnancy since it can be misdiagnosed easily and has high mortality rate. It is diagnosed when the implantation site is at the junction between the fallopian tube and the uterus. For a successful outcome, early diagnosis and management are critical. The traditional management is surgical, involving cornual resection or hysterectomy, which, however, affects fertility. Thus, conservative management involving administration of methotrexate should always be considered.

Case presentation

The article describes to two women in their early forties with no previous children (G1, P0) and diagnosed with a cornual pregnancy at 7 and 8 weeks of gestation following in vitro fertilization. Given their hemodynamic stability and their desire to conserve fertility they were treated conservatively. The two patients had similar ultrasound findings and blood results. The main difference was the presence of an embryonic heart beat in one case. Successful management was accomplished with multidose methotrexate and leucovorin during hospitalization for 8 days and close monitoring for the next 30 days as outpatients. In addition, the second woman was given a transvaginal injection of potassium chloride (KCL) to stop embryonic cardiac activity.

Conclusion

Conservative management of cornual pregnancies applying multidose therapy of methotrexate and leucovorin is a safe treatment when patients are asymptomatic and preserves fertility.

•

Cornual pregnancy is the most dangerous type of ectopic pregnancy.

•

Conservative treatment using multiple doses of methotrexate is safe and effective.

•

When fetal cardiac activity is present KCL injection should be used.

•

If the woman becomes hemodynamically unstable an operation is the only solution.

•

With conservative management female fertility remains unaffected.

P–261 The human embryo following biopsy on day5 vs day3: Implantation, cytoskeleton, ultrastructure and effects of endometrial damage/inflammation on receptivity as revealed by scanning electron microscopy

Study question

Are there any differences in implantation, cytoskeleton and ultrastructure of embryos biopsied on day5 vs day3 and how endometrial damage/inflammation may affect receptivity and implantation?

Summary answer

No differences are observed in implantation rates but vitrification following day5 biopsy led to more cytoskeletal/ultrastructural anomalies. Infections and epithelial damage severely affected endometrial receptivity.

What is known already

Successful implantation is dependent on the correct synchronization of the window of implantantation with the transfer of chromosomally/genetically normal embryos, in a well prepared receptive endometrium. This is the first study to examine the effects of day5 vs day3 embryo biopsy by comparing implantation/pregnancy rates and by analysing cytoskeleton using Confocal Laser Scanning Microscopy (CLSM), and ultrastructure by Transmission Electron Microscopy (TEM). In addition, Scanning Electron Microscopy (SEM) was used on endometrial biopsies to assess possible uterine pathologies/inflammation that may be responsible for the failed implantation after PGT-A/M and if subsequent treatment can increase implantation/pregnancy rates in succeeding PGT-A/M cycles.

Study design, size, duration

470 embryos were biopsied on day5 for PGT-A (n = 152–37 cycles) or on day3 for PGT-A (n = 162–29 cycles) and PGT-M (n = 156–22 cycles). Following transfer of normal embryos, spare embryos, rejected for transfer following day5 or day3 biopsy were processed for Cytoskeletal analysis (n = 30 fresh day3 biopsied, n = 30 day5 biopsied/vitrified) or TEM (n = 20 fresh day3 biopsied, n = 20 day5 biopsied/vitrified). Also, patients with a –ve hCG test, underwent endometrial biopsy to detect infection/inflammation and assess receptivity.

Participants/materials, setting, methods

Cytoskeletal analysis was performed by embryo immunostaining with α-tubulin, γ-tubulin, acetylated-tubulin antibodies and DAPI or/ PI to visualise DNA. TEM analysis was carried out following embryo fixation in gluteraldehyde, incubation in osmium, aqueous uranyl acetate, dehydration through ethanol series, and immersion in Epon. Endometrial biopsies were fixed in gluteraldehyde solution and processed for SEM using standard methods. The study was conducted in an academic hospital with an IVF/PGD laboratory and 3 private IVF Units.

Main results and the role of chance

162 embryos were biopsied on day 3 for PGT-A (29 cycles), 10 cycles had no normal embryos for transfer, 30 normal embryos were transferred in 19 cycles leading to 12/19 (63.2%) +vehCG/ET and 11/19 (57.9%) Ongoing pregnancy rate/ET. 156 embryos were biopsied on day 3 for PGT-M (22 cycles), 2 cycles had no normal embryos for transfer, 34 normal or carrier embryos were transferred in 20 cycles leading to 15/20 (75.0%) +vehCG/ET and 13/20 Ongoing pregnancy rate/ET (65.0%). 152 embryos were biopsied on day 5 for PGT-A (37 cycles), 8 cycles had no normal embryos for transfer, 34 normal embryos were transferred in 29 cycles leading to 18/29 (62.1%) +vehCG/ET and 16/29 (55.2%) Ongoing pregnancy rate /ET. Analysis of endometrial biopsies with SEM revealed bacterial infections, inflammation and epithelial damage. So far, 33.3% of patients who received intracavitary infusions-antibiotic treatment per os achieved a +vehCG/ET in their next PGT-A/M cycle. Cytoskeletal analysis showed that the majority of spindles examined in both day3 and day5 biopsied embryos were normal (85/114(74.6%) and 87/137(63.5). However vitrification following day5 biopsy led to more cytoskeletal/ultrastructural anomalies which included multipolar/abnormally shaped spindles, chromosome-bridging, chromosome-lagging and more vacuoles, lipofuscins. and distension of mitochondria.

Limitations, reasons for caution

Patients undergoing PGT-A have various aetiologies (heterogeneous group). The embryos used for cytoskeletal and ultrastructural analysis in this study were all diagnosed with either chromosomal abnormalities or single gene defects following PGT-A or PGT-M.

Wider implications of the findings: This is the first study to compare implantation/pregnancy rates, cytoskeleton and ultrastructure of day5 vs day3 biopsied embryos. The similarities observed in implantation/pregnancy rates, and the limited ultrastuctural and cytoskeletal anomalies identified confirm the procedures’ safety and indicate in certain cases endometrial factors/inflammation responsible for failed implantation following PGT-A/M.

Trial registration number

Not applicable

P–022 Improvement in sperm concentration and motility after oral antioxidant supplementation in infertile men with varicocele who have not undergone surgical repair: systematic review and meta-analys

Study question

Does oral antioxidant supplementation improve sperm quality in infertile men with varicocele who have not undergone surgical repair?

Summary answer

Oral antioxidant supplementation improves sperm concentration and motility in infertile men with varicocele who have not undergone surgical repair. What is known already: Benefit from oral antioxidant supplementation has been shown in infertile men with varicocele following surgical repair. Similarly, oral antioxidant supplementation has been suggested in infertile men with varicocele who have not undergone surgical repair. However, its effect currently remains controversial.

Study design, size, duration

A literature search was performed until January 2021 aiming to identify prospective studies evaluating the use of oral antioxidant supplementation alone or in combination in men with varicocele who have not undergone surgical repair.

Participants/materials, setting, methods

Seven prospective studies were identified, published between 1987 and 2018, including 278 infertile men with varicocele who had not undergone surgical repair. The number of patients included ranged from 20 to 65. Sperm analysis, evaluating sperm concentration, motility and morphology was performed in these studies before and after oral antioxidant supplementation. Meta-analysis of weighted data was performed using random effects model. Results are reported as weighted mean difference (WMD) with 95% confidence interval (CI).

Main results and the role of chance

Seven studies were included in the systematic review. Oral antioxidant supplementation was performed by a combination of pentoxifylline, zinc and folic acid (single study), a combination of l-carnitine, fumarate, acetyl-l-carnitine, fructose, CoQ, vitamin C, zinc, folic acid and vitamin B12 (single study), a combination of L-Carnitine, vitamin C, coenzyme Q10, vitamin E, vitamin B9, vitamin B12, zinc , and selenium, l-carnitine (single study), or sole treatment with acetyl-l-carnitine (single study), L-Carnitine (single study), Coenzyme Q10 (single study) or zinc sulfate (single study). For the purpose of meta-analysis, the effect of oral antioxidant supplementation was evaluated after three months of treatment.

Oral antioxidant supplementation significantly increased sperm concentration (WMD +5.65x106/ml 95% CI: +1.11 to + 10.12 p = 0.01, random effects model) and motility (WMD +4.30%, 95% CI: +0.86 to + 7.74 p = 0.01, random effects model) in infertile men with varicocele who had not undergone surgical repair.

On the other hand, no significance difference was observed in sperm morphology (WMD +3.9%, 95% CI: –0.16 to + 8.04 p = 0.06, random effects model) and volume (WMD +0.53ml, 95% CI: 0.0 to + 1.0 p = 0.052, random effects model).

Limitations, reasons for caution

The number of relevant trials and that of patients included is small to allow for solid conclusions to be drawn. Moreover, although different oral antioxidants have been administered in infertile who had not undergone surgical repair, subgroup analysis was not feasible.

Wider implications of the findings: Currently, limited evidence supports the use of oral antioxidants in the treatment of men with varicocele, who have not undergone surgical repair. Although the benefit in sperm concentration and motility appears to be modest, it might be important regarding achievement of pregnancy in these men.

Trial registration number

Not applicable

O-173 Decline in anti-Müllerian hormone (AMH) concentrations following radioactive iodine (RAI) treatment in women with differentiated thyroid cancer (DTC): a systematic review and meta-analysis

Study question

Does radioactive iodine (RAI) treatment in premenopausal women with differentiated thyroid cancer (DTC) affects ovarian reserve, as evaluated by anti-Müllerian hormone (AMH), antral follicle count (AFC) and follicle-stimulating hormone (FSH)?

Summary answer

AMH concentrations decreased at three, six and 12 months following RAI treatment in women with DTC, whereas no difference was observed regarding FSH.

What is known already

Thyroid cancer is the third most common type of female malignancy and DTC is the most common histopathological type. Thyroidectomy constitutes the mainstay of treatment for DTC, followed by administration of RAI, which acts as an adjuvant therapy to destroy residual cancerous thyroid tissue. However, the effect of RAI on ovarian reserve of these women, as assessed by AMH, AFC and FSH, remains controversial.

Study design, size, duration

A systematic review and meta-analysis was performed aiming to identify studies evaluating the effect of RAI treatment on ovarian reserve in women with DTC. For this purpose, a literature search in the electronic databases PubMed, Scopus and CENTRAL was carried out until 06/12/2020. The primary outcome measure was the effect of RAI on ovarian reserve, as evaluated by AMH, AFC and FSH.

Participants/materials, setting, methods

Studies were eligible if they included premenopausal women with DTC, treated with a single RAI dose and assessed for at least one marker of ovarian reserve repeatedly within 12 months post-RAI.Meta-analysis of weighted data was performed using random effects model. Results were reported as weighted mean difference (WMD) with 95% confidence interval (CI).

Main results and the role of chance

Four prospective eligible studies, published between 2005 and 2020, were eligible for the meta-analysis, evaluating a total of 154 women. The number of participants ranged from 24 to 50. The single dose of RAI used to treat DTC ranged from 50 to 150 mCi. AMH concentrations decreased at three (WMD -1.66 ng/ml, 95% CI -2.42 to -0.91, p &lt; 0.0001; I2 0%), six (WMD -1.58 ng/ml, 95% CI -2.63 to -0.52, p = 0.003; I2 54.7%) and 12 months (WMD -1.62 ng/ml, 95% CI -2.02 to -1.22, p &lt; 0.0001; I2 15.5%) following a single RAI dose compared with baseline (three studies; n = 104). With respect to FSH concentrations, no difference was observed at six (WMD +3.29 IU/l, 95% CI -1.12 to + 7.70, p = 0.14; I2 96.8%) and 12 months (WMD +0.13 IU/l, 95% CI -1.06 to + 1.32, p = 0.83; I2 55.2%) post-RAI compared with baseline (two studies; n = 83). No data on AFC was available.

Limitations, reasons for caution

The small number of studies and patients included, as well as the lack of data on AFC may have compromised the validity of the conclusions drawn. Moreover, subgroup analysis according to female age was not feasible, due to the lack of relevant data.

Wider implications of the findings

The negative effect of RAI on ovarian reserve in premenopausal women with DTC, as indicated by the decreased AMH, should be confirmed by data on AFC, which are currently not available. These findings necessitate close monitoring of ovarian reserve in such women, counselling them regarding the need for fertility preservation.

Trial registration number

N/A

Regimen of ovarian stimulation affects oocyte and therefore embryo quality

Without any doubt the regimen used to mature multiple capable oocytes for IVF impacts IVF outcomes. Studies have indicated that the inclusion of LH activity, adjuvant agents such as growth hormone (GH), and regimens providing for simultaneous action of both LH and FSH during final oocyte maturation may have beneficial effects on IVF outcomes. Because of the difficulty in improving IVF outcomes in poor responders, the studies on GH are of particular interest. As pointed out in this review, the apparent beneficial effects of GH on oocyte competence may also apply to older women or to normal responders with reduced embryo quality. A much more difficult question is whether and how much ovarian stimulation impacts on oocyte competence. Paradoxically it seems that there are not demonstrated differences between the stimulated and the natural unstimulated cycle, whereas studies in laboratory animals and IVF patients have shown deleterious effects of higher compared with lower doses of gonadotropins. Recent studies suggest that the use of high doses of gonadotropins as an independent factor correlates negatively with the probability of live birth, whereas a high ovarian response per se is associated with better cumulative pregnancy rates, owing to the availability of more euploid and good-quality embryos. Although adjunctive use of androgens has not been discussed here, it is briefly covered in the first review of this series.

Aromatase inhibitors in ovarian stimulation for IVF/ICSI: a pilot study

This prospective randomized pilot study was aimed at investigating the effect of the novel addition of aromatase inhibitors to an ovarian stimulation protocol for IVF or intracytoplasmic sperm injection, on endocrine parameters including serum androgen, oestrogen, progesterone, LH and FSH concentrations. The patients were randomized to receiving letrozole (group A; n = 10), versus no letrozole (group B; n = 10) in an ovarian stimulation protocol with recombinant FSH 150 IU/day starting on day 2 of the cycle, and gonadotrophin-releasing hormone antagonist 0.25 mg/day starting on day 6 of the cycle. Median LH concentrations were significantly higher (P < 0.01) in group A versus group B during letrozole administration. Median serum oestradiol concentrations were lower in group A versus group B, and median serum FSH, testosterone and androstenedione concentrations were higher in group A versus group B, throughout the follicular phase, without reaching significance. Median endometrial thickness was significantly higher (P < 0.05) in group A versus group B on the day of human chorionic gonadotrophin administration. Pregnancies were achieved. This pilot study supports the idea that aromatase inhibitors can contribute to normal potential of implantation and follicular response, without having negative anti-oestrogenic effects.

Achievement of pregnancy three times in the same patient during luteal GnRH agonist administration

Gonadotrophin-releasing hormone agonist (GnRHa) administration from the mid-luteal phase onwards is considered the gold standard of ovarian stimulation for IVF treatment. It might, however, coincide with an implanting spontaneous pregnancy. Concerns have therefore been raised with regard to the evolution of the resulting pregnancies and long-term outcome of the children born. The current case report describes the achievement of three pregnancies in the same patient during luteal administration of GnRHa. One pregnancy ended in spontaneous abortion and the other two resulted in the delivery of two female infants. The children have so far been followed for 3.5 and 7 years. The physical examination of both children was unremarkable. However, the older child has recently been diagnosed with attention deficit hyperactivity disorder and dyslexia.

Is chromosome analysis mandatory in the initial investigation of normovulatory women seeking infertility treatment?

BACKGROUND

There is no agreement about the frequency of chromosomal abnormalities (CAs) in the female partner of an infertile couple and therefore there is no evidence base for determining whether karyotype analysis is mandatory before the initiation of infertility treatment. The aim of this prospective study was to estimate the prevalence of karyotype abnormalities in normovulatory women attending an infertility clinic and compare it to that known to be present in the newborn female population.

METHODS

Cytogenetic testing was performed in 1206 women with normal ovulatory cycle seeking infertility treatment. At least 15 GTG-banded metaphases were analysed in each case. In the case of a structural abnormality, fluorescent in situ hybridization (FISH) analysis and high resolution banding (HRB) were performed on a new blood sample to elucidate the aberration. When mosaicism was suspected, the number of analysed metaphases was increased to a total of 115 and an additional analysis of 200 metaphases was done on a second blood sample.

RESULTS

A chromosomal abnormality was demonstrated in 0.58% (95% CI: 0.28-1.19) of cases which did not differ significantly from that reported in female newborns (0.79%; 95% CI: 0.68-0.94). Balanced reciprocal translocation was observed in 0.4% of patients (n = 5), paracentric inversion of chromosome X in 0.08% (n = 1) and gonosomal mosaicism in 0.08% (n = 1). However, chromosomal aberrations were less common among females with primary infertility compared to those with secondary infertility (0.25 versus 1.25%, P = 0.04).

CONCLUSIONS

The present study suggests that routine cytogenetic analysis cannot be advocated in normovulatory infertile women. Nevertheless, the relatively higher frequency of abnormal karyotypes in women with secondary infertility indicates that this subgroup of patients might benefit from a routine karyotype analysis.

Emerging drugs in assisted reproduction

Infertility affects approximately 15% of couples of reproductive age. In assisted reproductive technology (ART), medications play a crucial role in stimulating ovaries to produce several oocytes and prepare the endometrium to be receptive after replacing one or more embryos into the uterine cavity. The availability of recombinant human follicle stimulating hormone, luteinising hormone and human chorionic gonadotrophin; of gonadotrophin-releasing hormone (GnRH) agonists and antagonists; and of luteal supplementation with progesterone have allowed the tailoring of several stimulation schemes, which have enhanced the pregnancy outcome after ART treatment. However, the remaining risk of ovarian hyperstimulation syndrome, the still low implantation rates, the unacceptably high rates of multiple pregnancies and the daily parenteral administration of medications do not constitute the features of a patient-friendly procedure. Therefore, a number of molecules with gonadotrophin-like activity, inhibition of GnRH receptor ability, or endometrium receptivity enhancement properties are currently under active investigation. Orally bioactive therapeutic preparations, in particular, may revolutionize in vitro fertilisation (IVF) treatment in the near future. Nevertheless, the implementation of mild ovarian stimulation protocols with single embryo transfer policy and further development of oocyte in vitro maturation techniques may lead to a less drug orientated IVF treatment.

Steroid receptor expression in late follicular phase endometrium in GnRH antagonist IVF cycles is already altered, indicating initiation of early luteal phase transformation in the absence of secretory changes

BACKGROUND

Ovarian stimulation for IVF profoundly alters the early luteal phase endometrial development. It has been hypothesized that this process has already started in the late follicular phase, as the endometrium has already been exposed to high steroid concentrations since that phase. The aim of the present study was to prospectively investigate the effect of multi-follicular ovarian stimulation for IVF on the late follicular phase endometrium histology and the expression of estrogen receptor (ER) and progesterone receptor (PR).

METHODS

In a cross-over study, 11 infertile women with normal ovulatory function, participating in an IVF programme and treated with GnRH antagonist/recombinant FSH ovarian stimulation, were enrolled in the study. Endometrial biopsies were taken in a natural cycle on the day of the onset of the surge of the LH, and in a subsequent stimulation cycle on the day of hCG administration for final oocyte maturation. Endometrial histological dating was carried out according to Noyes' criteria. Immunohistochemistry was performed, using commercially available antibodies for ER and PR endometrial expression. The immunohistochemical signal was recorded in 1000 epithelial cells in each compartment (glands and stroma). Endometrial expression for each of the two receptors was graded on a scale of 0-3, based on the intensity of nuclear staining. Then a score range between 0 and 3000 was recorded, and expressed as a mean score per 1000 stroma or glandular cells per sample (range: 0-3).

RESULTS

Histological examination of biopsies both in natural and stimulated cycles showed no secretory changes. However, in stimulated cycles, PR expression was significantly up-regulated compared to natural cycles in both glands (1.67 versus 1.34, P < 0.05) and stroma (1.98 versus 1.62, P < 0.05), whereas ER was down-regulated in glands (1.15 versus 1.43, P < 0.05). In IVF cycles, the progesterone measurements, although within normal values (range 0.8-1.4 microg/l), were significantly higher than in natural cycles (0.99 vs 0.63 microg/l, respectively, P = 0.008). An ongoing pregnancy rate of 37.5% was achieved in the stimulated cycles.

DISCUSSION

Although the current study found no early secretory transformation in stimulated endometria before hCG administration, the ER and PR expression in these endometria is similar to the one described during the first days of the luteal phase in natural cycles. Supraphysiological concentrations of estradiol and subtle progesterone rises in the late follicular phase might be responsible for this modulated steroid receptor profile. This phenomenon indicates accentuated maturation of the endometrium in IVF cycles from the pre-ovulatory phase onwards.

Modified natural cycle for IVF does not offer a realistic chance of parenthood in poor responders with high day 3 FSH levels, as a last resort prior to oocyte donation

BACKGROUND

The purpose of this study was to evaluate the use of the modified natural cycle (MNC) for IVF in poor responders as a last resort prior to oocyte donation.

METHODS

Thirty-two patients with a regular menstrual cycle, FSH levels on day 3 of the cycle >12 IU/l and one or more failed IVF cycles with five or fewer cumulus-oocyte complexes (COCs) retrieved were included in this prospective study. Recombinant FSH 100 IU and GnRH antagonist 0.25 mg/day were started concomitantly when a follicle with a mean diameter of 14 mm was present at ultrasound. HCG 10 000 IU was administered as soon as the mean follicular diameter was > or =16 mm.

RESULTS

Twenty-five out of 78 cycles performed (32.1%) did not result in oocyte retrieval. In nine out of 53 cycles (16.9%) in which oocyte retrieval was performed, no COCs were retrieved. Following fertilization, embryo transfer was performed in 19 out of 44 cycles in which COCs were retrieved (43.2%). No ongoing pregnancy was achieved in 78 MNCs (0.0%; 95% confidence interval 0.0-4.7).

CONCLUSIONS

MNC does not offer a realistic chance of parenthood in patients with high levels of FSH on day 3 of the cycle and previous poor response to ovarian stimulation, when offered as a last resort prior to oocyte donation.

Is addressing the needs of its membership an easy task for the American Society for Reproductive Medicine?

The survey conducted by the American Society for Reproductive Medicine (ASRM) aimed to increase our understanding of the practices and opinions of ASRM members and to assist in decision making for the benefit of the society. Despite some limitations, this is the first step for ASRM to understand better its members, on whom its existence depends and whom it should serve.

Clomiphene citrate versus letrozole for ovarian stimulation: a pilot study

The purpose of this pilot study was to compare the endocrinological environment of cycles stimulated with clomiphene citrate (CC) or letrozole. Fifteen patients undergoing intrauterine insemination (IUI) received from day 3 to day 7 of the cycle either letrozole 2.5 mg/day (n = 7) or clomiphene citrate 100 mg/day (n = 8). IUI was performed one day after the detection of LH peak. No luteal support was administered. Significantly lower serum oestradiol concentrations were present in the follicular phase on days 9, 13 and 15 of the cycle and in the luteal phase on days 3 and 6 post-IUI in the letrozole group compared with those in the CC group. Progesterone concentrations and oestradiol concentrations were significantly lower in the letrozole group than in the CC group on the day of LH peak. Significantly more follicles developed in patients in the CC group compared with those in the letrozole group. In conclusion, significantly lower oestradiol concentrations and fewer follicles are observed in cycles stimulated with 2.5 mg letrozole compared with cycles stimulated with 100 mg CC from day 3 to day 7 of the cycle.

Quintuplet pregnancy following transfer of two blastocysts: Case report

A 36-year-old single woman presented at the out-patient clinic in March 2000 requesting donor insemination. Between May 2000 and May 2001 she underwent six cycles of intrauterine insemination with donor sperm after clomiphene citrate stimulation without achieving a pregnancy. In January 2002, ICSI was performed; two embryos were transferred on day 3 and a dizygotic bichorionic pregnancy was achieved, which ended in a miscarriage at 21 weeks of gestation. After a second unsuccessful ICSI attempt in which a single embryo transfer was performed, she embarked upon her third attempt in March 2003 at 39 years of age. Two blastocysts were transferred after ICSI, resulting in a quintuplet gestation consisting of a monochorionic biamniotic pregnancy and a monochorionic triamniotic pregnancy. The current case report indicates that monozygotic pregnancies consisting of both twins and triplets are possible after treatment by assisted reproductive technologies. An association between extended culture, manipulation of the zona pellucida, ovarian stimulation and occurrence of monozygotic pregnancies has been suggested by retrospective studies. However, in order to identify more reliably predictive factors for the occurrence of monozygotic pregnancies, it is necessary to perform prospective trials.

Cumulative live birth rates after transfer of cryopreserved ICSI embryos

A cohort follow-up study was designed to assess the efficacy of an intracytoplasmic sperm injection cryopreservation programme through analysis of cumulative live birth rates in successive frozen-thawed cycles in a tertiary referral centre. There were 2013 patients and they underwent 2680 frozen-thawed embryo transfer cycles. The follow-up period was between 1992 and 2001. Only frozen-thawed embryo transfer cycles up to the fourth trial were included. Crude cumulative live birth rates were calculated in five age subgroups, i.e. <30, 30-34, 35-37, 38-39 and >/=40 years old and in surgically or non-surgically retrieved sperm subgroups. Expected cumulative live birth rates were calculated only for the total number of patients. Outcome measure was a live birth occurring after 25 weeks of gestation. Overall, the expected cumulative live birth rate was as high as 26.7% after four cycles while the crude cumulative delivery rate was 10.5%. Multiple cryopreserved embryo transfer cycles increase the chance of a couple to achieve a live birth.

Cumulative delivery rates after ICSI treatment cycles with freshly retrieved testicular sperm: a 7-year follow-up study

BACKGROUND

The purpose of this study was to assess cumulative delivery rates in patients with non-obstructive or obstructive azoospermia following treatment by testicular sperm extraction (TESE)-ICSI.

METHODS

A cohort follow-up study was conducted. Between January 1994 and December 2000, 364 couples with obstructive azoospermia underwent a total of 609 fresh TESE-ICSI treatment cycles. In addition, 303 fresh TESE-ICSI treatment cycles were performed in 235 couples for non-obstructive azoospermia. This study included only patients in whom sperm was recovered. In the non-obstructive group, only patients with maturation arrest, atrophic sclerosis and germ cell aplasia were included. The main outcome measure was a delivery beyond 25 weeks gestation.

RESULTS

In patients with obstructive azoospermia, the crude delivery rate after three cycles was 35% while the expected cumulative delivery rate was 48% [95% confidence interval (CI), 41-55]. On the other hand, in patients with non-obstructive azoospermia, the crude cumulative delivery rate after three treatment cycles was 17% while the expected delivery rate was 31% (95% CI, 15-46). A high dropout rate in couples with both non-obstructive and obstructive azoospermia was observed (75 and 50% respectively, after the first cycle).

CONCLUSION

This study shows that there is a value in performing several TESE-ICSI attempts in patients with obstructive and non-obstructive azoospermia. The estimates of the non-obstructive group beginning from the third cycle are less reliable due to fewer patients. However, overall, the obstructive group performed better than the non-obstructive group.

Prenatal genetic testing by amniocentesis appears to result in a lower risk of fetal loss than chorionic villus sampling in singleton pregnancies achieved by intracytoplasmic sperm injection

OBJECTIVE

To compare pregnancy outcome after prenatal genetic testing by chorionic villus sampling (CVS) or amniocentesis in singleton pregnancies achieved by intracytoplasmic sperm injection (ICSI).

DESIGN

Retrospective analysis.

SETTING

Tertiary referral center.

PATIENT(S)

Eight hundred twenty-eight patients with singleton gestations achieved by ICSI.

INTERVENTION(S)

Midtrimester amniocentesis (685 patients) and first-trimester CVS (143 patients).

MAIN OUTCOME MEASURE(S)

Fetal loss rate, preterm delivery rate, and proportion of babies born with low or very low birth weight.

RESULT(S)

A significant difference was observed in fetal loss rate between CVS and amniocentesis (3.7% vs. 0.9%, respectively). On the other hand, a similar preterm delivery rate was present between the two methods (11.2% vs. 12.4%, respectively). No significant difference was observed between amniocentesis and CVS in the proportion of babies with birth weight of either <1,500 g (1.8% vs. 3.8%, respectively) or between 1,500 and 2,500 g (8.2% vs. 4.6%, respectively).

CONCLUSION(S)

Amniocentesis appears to result in a lower risk of fetal loss as compared with CVS in patients with a singleton pregnancy achieved by ICSI.

Reproductive outcome of polycystic ovarian syndrome patients treated with GnRH antagonists and recombinant FSH for IVF/ICSI

The purpose of this prospective study was to assess the reproductive outcome of patients with polycystic ovarian syndrome (PCOS) treated by in-vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI) with recombinant FSH (rFSH) and gonadotrophin releasing hormone (GnRH) antagonists. One hundred and ten patients were evaluated. The starting dose of rFSH was 100 IU in 67 women with body mass index (BMI) </=29 kg/m(2) and 200 IU in 43 women with BMI >29 kg/m(2). GnRH antagonist was started by the detection of a follicle of a 15mm in ultrasound scan. A significantly lower ongoing pregnancy rate per oocyte retrieval (25.6% versus 46.7%, P = 0.04) and a higher occurrence of ovarian hyperstimulation syndrome (16.3% versus 3.0%, P = 0.03) was observed in the group of patients with BMI >29 kg/m(2) as compared with the group of patients with BMI </=29 kg/m(2), respectively. In conclusion, in GnRH antagonist cycles a worse reproductive outcome is expected in PCOS patients with BMI >29 kg/m(2) in whom stimulation is initiated with 200 IU of rFSH as compared with PCOS patients with BMI </=29 kg/m(2) in whom stimulation is initiated with 100 IU of rFSH.

Effect of ovarian stimulation with recombinant follicle-stimulating hormone, gonadotropin releasing hormone antagonists, and human chorionic gonadotropin on endometrial maturation on the day of oocyte pick-up

OBJECTIVE

To assess the effect of ovarian stimulation with recombinant FSH, GnRH antagonists, and hCG on endometrial maturation on the day of oocyte pick-up.

DESIGN

Prospective study.

SETTING

Tertiary referral center.

PATIENT(S)

Fifty-five women undergoing controlled ovarian hyperstimulation for IVF/intracytoplasmic sperm injection (ICSI).

INTERVENTION(S)

[1] Ovarian stimulation with recombinant FSH, starting on day 2 of the cycle and GnRH antagonist, starting after a median of 6 days of recombinant FSH stimulation (range, 5-12 days); [2] hCG administration for ovulation induction; and [3] aspirational biopsy of endometrium at oocyte pick-up.

MAIN OUTCOME MEASURE(S)

Endometrial histology at oocyte pick-up by Noyes criteria.

RESULT(S)

Advancement of endometrial maturation (2.5 +/- 0.1 days) as compared to the expected chronological date was observed in all antagonist cycles at oocyte retrieval. Endometrial advancement at oocyte pick-up increased in line with values of LH at initiation of stimulation and the duration of recombinant FSH treatment before the antagonist was started.

CONCLUSION(S)

The higher the values of LH at initiation of stimulation and the longer the duration of recombinant FSH treatment before the antagonist is started, the more advanced the endometrial maturation at oocyte pick-up.

Spontaneous pregnancies in couples who discontinued intracytoplasmic sperm injection treatment: a 5-year follow-up study

OBJECTIVE

To analyze the occurrence of deliveries after spontaneous conception in patients who have discontinued unsuccessful intracytoplasmic sperm injection (ICSI) treatment.

DESIGN

Cohort follow-up study.

SETTING

Tertiary referral center.

PATIENT(S)

Between July 1992 and December 1993, 200 Belgian women younger than 37 years underwent 433 consecutive unsuccessful ICSI cycles with freshly ejaculated sperm and eventually discontinued their treatment.

INTERVENTION(S)

Ultrasound-guided oocyte retrieval and ICSI.

MAIN OUTCOME MEASURE(S)

Delivery after 25 weeks following a spontaneous pregnancy.

RESULT(S)

The mean age at the time of the last oocyte pick-up was 31.0 +/- 3.9 years. The mean time interval between the last ICSI and the end of the follow-up period was 47.7 +/- 12.1 months. Twenty-three spontaneous pregnancies ending in delivery after 25 weeks were observed (11.5%). The cumulative delivery rate reached a plateau of 10% after 36 months of follow-up. The mean time interval (from last oocyte retrieval) for spontaneous pregnancy to occur after discontinuing ICSI treatment was 20.2 +/- 13.7 months. Proportional hazards analysis showed that delivery rate was reduced by 2.0% per year of infertility.

CONCLUSION(S)

This study suggests that duration of infertility appears to be predictive of the likelihood of live delivery after spontaneous conception following an unsuccessful ICSI treatment.

Effect of repeated assisted reproductive technology cycles on ovarian response

OBJECTIVE

To assess the effect of repeated assisted reproductive technology (ART) cycles on the ovarian response in patients treated with human menopausal gonadotropins and GnRH agonists.

DESIGN

Retrospective analysis.

SETTING

Tertiary referral center.

PATIENT(S)

Three thousand two hundred forty-nine patients who had completed at least two in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) cycles (minimum two, maximum six cycles per patient).

INTERVENTION(S)

Nine thousand three hundred seventy-nine repeated IVF/ICSI cycles.

MAIN OUTCOME MEASURE(S)

Mean number of cumulus oocyte complexes (COC) retrieved per cycle, mean number of ampules used per attempt.

RESULT(S)

Repeated ART cycles did not exert a significant effect on the mean number of COC retrieved per attempt in contrast to maternal age, which was inversely related to the mean number of COC retrieved in all cycles performed. Across repeated ART attempts, an increase in the mean number of ampules used per cycle was observed. This was due to an effect of maternal age, which increased in line with the mean number of ampules used per cycle, as well as to an age-independent effect of repeated cycles.

CONCLUSION(S)

An age-independent deterioration of the ovarian response appears to occur across repeated ART cycles.