1
|
Arslan S, Güler A, Güngör N, Dağaşan Ö, Yiğitkaya S, Kale LY, Numanoğlu E, Balaban B, Özaltın KE, Merken Ö, Kacar G. False positive effect of sulfur sources used in growing and processing of vine ( Vitis Vinifera L.) leaves on the results of dithiocarbamate analysis based on carbon disulfide measurement. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2022; 39:1565-1575. [PMID: 35771808 DOI: 10.1080/19440049.2022.2093987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Vine leaves, which are produced fresh, brined or fermented from the leaves of Vitis Vinifera in Türkiye are an important food. Sulfur is used as a pesticide and sulfur compounds can be used as additives during the growing and processing of the vine leaves. These sulfur sources cause positive results on carbon disulfide (CS2) measurements by GC-MS. Therefore, the main objective of the present study was to investigate the effects of residues of sulfur or sulfur compounds on dithiocarbamate analysis methods based on CS2 measurement. For this, vine leaves were produced by controlled agricultural production and processed as brine under controlled conditions. The sulfur dioxide (SO2) and dithiocarbamate analysis were carried out on the vine leave obtained by applying sulfur spraying in agricultural treatments and brined vine leaves produced by adding sodium metabisulfite (SM), and control samples of each stage. SO2 was not detected in any of the samples in this study. SO2 residues did not occur in the vine leaves as a result of the sulfur spraying application and therefore did not have a false positive effect on dithiocarbamate analysis. However, approximately 0.15 mg kg-1 false positive dithiocarbamate was detected, which is thought to originate from natural sulfur in the vine leaves. The effect of SM, which was used in low concentration in the production of brined vine leaves, on dithiocarbamate results was limited. Even if SM was not used, the total false positive dithiocarbamate result in the brined vine leaves production process was approximately determined as 0.20 mg kg-1. This study showed that the dithiocarbamates analysis method based on CS2 measurement may lead to false positive results in brined vine leaves since sulfur compounds are found naturally in vine leaves.
Collapse
Affiliation(s)
- Sinan Arslan
- Ministry of Agriculture and Forestry, General Directorate of Food and Control, Ankara, Türkiye
| | - Ali Güler
- Ministry of Agriculture and Forestry, Viticulture Research Institute, Manisa, Türkiye
| | - Nurdan Güngör
- Ministry of Agriculture and Forestry, Viticulture Research Institute, Manisa, Türkiye
| | - Özlem Dağaşan
- Ministry of Agriculture and Forestry, Food Control Laboratory Directorate, Antalya, Türkiye
| | - Sema Yiğitkaya
- Ministry of Agriculture and Forestry, General Directorate of Food and Control, Ankara, Türkiye
| | - Leyla Yeşim Kale
- Provincial Directorate of Agriculture and Forestry, Ministry of Agriculture and Forestry, Manisa, Türkiye
| | - Eren Numanoğlu
- Ministry of Agriculture and Forestry, General Directorate of Food and Control, Ankara, Türkiye
| | - Beyza Balaban
- Ministry of Agriculture and Forestry, General Directorate of Food and Control, Ankara, Türkiye
| | - Kadir Emre Özaltın
- Ministry of Agriculture and Forestry, Viticulture Research Institute, Manisa, Türkiye
| | - Özen Merken
- Ministry of Agriculture and Forestry, Viticulture Research Institute, Manisa, Türkiye
| | - Güneş Kacar
- Provincial Directorate of Agriculture and Forestry, Ministry of Agriculture and Forestry, Manisa, Türkiye
| |
Collapse
|
2
|
Kromp F, Balaban B, Cottin V, Saiz IC, Fancsovits P, Fawzy M, Findikli N, Kovacic B, Ljiljak D, Rodero IM, Parmegiani L, Shebl O, Wagner R, Xie M, Ebner T. O-285 Artificial intelligence algorithms reach expert-level accuracy in automated grading of blastocyst morphology assessment based on static embryo images and Gardner criteria. Hum Reprod 2022. [DOI: 10.1093/humrep/deac106.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Study question
Can artificial intelligence (AI) algorithms reach expert-level accuracy in blastocyst morphology assessment according to Gardner criteria?
Summary answer
The prediction accuracy of the best performing AI algorithm (Deit), outperformed human-level mean accuracies compared to an embryologist majority vote for all Gardner morphological criteria.
What is known already
Routinely, morphological grading of blastocysts is performed visually according to Gardner criteria, which suggest expansion (EXP), quality of inner cell mass (ICM), and trophectoderm (TE) as key parameters to predict treatment outcome. Consequently, blastocyst scoring is prone to inter-and intra-observer variability, which may lead to inconsistencies in selecting blastocysts for transfer. AI-based algorithms may help to improve treatment outcome predictability, as it has been suggested recently. In those studies, parameters such as blastocyst quality or stage were annotated by experts from static or time-lapse-derived blastocyst images, to train AI algorithms, e.g. XCeption or YOLO, and compare them to human annotators.
Study design, size, duration
This retrospective study involves 2,270 images from 837 patients collected over a period of four years in a university IVF clinic.
Participants/materials, setting, methods
All images were annotated by one senior embryologist and divided into a training and a balanced test set. Subsequently, eight embryologists labeled 300 test set images such that every single image was seen by at least four embryologists. Annotators diverging from the ensemble vote for more than one standard deviation were excluded (n = 2) to set the ground truth labels. Finally, three AI architectures (XCeption, Swin, Deit) were trained and evaluated on that particular ground truth.
Main results and the role of chance
Out of nine annotators, labelling accuracy of two embryologists diverged from the consensus vote for more than one standard deviation for at least one of the three Gardner criteria. The consensus vote was built from the remaining seven annotators (mean accuracy EXP 0.81, ICM 0.70, TE 0.67). The Swin architecture outperformed the mean expert accuracy for all three criteria (EXP 0.82, ICM 0.76, TE 0.68), while the Deit and the XCeption architecture outperformed the mean expert accuracy in ICM accuracy (Deit 0.72, XCeption 0.73), and performed equal or worse in EXP and TE accuracy (Deit EXP 0.77, ICM 0.73; XCeption EXP 0.77, TE 0.66). When compared to a recent study conducted on time-lapse imaging data using AI algorithms, all our models outperform the ICM accuracy and achieve comparable TE accuracy. To minimize the role of chance in calculating the models' prediction accuracies, the SWA-Gaussian (SWAG) algorithm was used. SWAG is a method to reflect and calibrate uncertainty representation in Bayesian deep learning. It is based on modelling a Gaussian distribution for each networks' weight and applying it as a posterior over all neural network weights to perform Bayesian model averaging.
Limitations, reasons for caution
To reflect a real IVF lab scenario, embryologists of different origins and levels of experience were involved and no scoring training was offered to the participants. These facts could have potentially negatively affected the degree of consensus, although we excluded two annotators diverging from the mean labeling accuracy.
Wider implications of the findings
In the past, AI algorithms proved to reliably differentiate between good and bad prognosis blastocysts but not necessarily between blastocysts of similar quality. Further AI-supported differentiation on the basis of expansion and cell lineages will facilitate the ranking of blastocysts and would bring automated scoring closer to clinical application.
Trial registration number
Not applicable.
Collapse
Affiliation(s)
- F Kromp
- Software Competence Center Hagenberg, Data science , Hagenberg, Austria
| | - B Balaban
- American Hospital of Istanbul, In vitro fertilization lab , Istanbul, Turkey
| | - V Cottin
- Bethesda Spital Basel, Assisted Reproduction Technology Unit , Basel, Switzerland
| | - I. Cuevas Saiz
- Hospital General Universitario de Valencia, In vitro fertilization lab , Valencia, Spain
| | - P Fancsovits
- Semmelweis University School of Medicine, Division of Assisted Reproduction , Budapest, Hungary
| | - M Fawzy
- IbnSina and Banon IVF Centers, In vitro fertilization lab , Sohag, Egypt
| | - N Findikli
- Bahceci Fulya IVF Centre Istanbul, In vitro fertilization lab , Istanbul, Turkey
| | - B Kovacic
- University Medical Centre Maribor, Department of Reproductive Medicine and Gynecological Endocrinology , Maribor, Slovenia
| | - D Ljiljak
- Sestre Milosrdnice University Hospital Center, Department of Gynecology and Obstetrics , Zagreb, Croatia
| | - I. Martínez Rodero
- Universitat Autònoma de Barcelona, Laboratori de Fecundació In Vitro , Barcelona, Spain
| | - L Parmegiani
- GynePro Medical Centers , Embryology lab , Bologna, Italy
| | - O Shebl
- Kepler University Linz, Gynecology- Obstetrics and Gynecological Endocrinology , Linz, Austria
| | - R Wagner
- Software Competence Center Hagenberg, Services and solutions , Hagenberg, Austria
| | - M Xie
- University Hospital Zurich, Department of Reproductive Endocrinology , Zurich, Switzerland
| | - T Ebner
- Kepler University Linz, Gynecology- Obstetrics and Gynecological Endocrinology , Linz, Austria
| |
Collapse
|
3
|
Ertas S, Balaban B, Urman B, Yakin K. P–785 Double versus sequential single blastocyst transfer in freeze all cycles? Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Study question
Is double blastocysts transfer (DET) better than sequential single blastocyst transfer (seq-SET) in freeze all cycles?
Summary answer
Sequential single blastocyst transfer provides a higher live birth rate (LBR) per cycle initiated and eliminates multiple births in freeze-all cycles.
What is known already
Improvements in cryopreservation technology helped freeze-all strategy gain much popularity. The new debate is whether guidance for single embryo transfer should also be applied to frozen-thawed embryo transfers in freeze-all cycles.
Study design, size, duration
We performed a retrospective cohort analysis of 860 women in whom the entire cohort of embryos frozen at the blastocyst stage for various indications. All women aged 19–43 years, who had at least two blastocysts frozen and subsequently thawed and transferred were included. Preimplantation genetic testing cycles were excluded.The study period ranged from January 2016 to May 2019.
Participants/materials, setting, methods
Data regarding female age, number of embryos transferred, multiple pregnancy and live birth rates (LBR) were extracted from the electronic database. Women were categorized based on their age and the mode of embryo transfer. Primary outcome was live birth rate LBR per cycle initiated. Secondary outcomes were LBR per embryo transfer and multiple birth rate. Groups were compared using Fisher’s test, generalized estimating equation model and logistic regression analysis to adjust for confounding factors.
Main results and the role of chance
The study group comprised of 666 women (371 Seq-SET and 295 DET) who underwent 837 embryo transfer cycles. Second embryo transfer was affected in 46.1% of women in the Seq-SET group. Age, indication for freeze-all, and mode of transfer were related with the LBR. For women ≤ 35 (n = 370), LBRs per embryo transfer were similar in single and double embryo transfers (53.9% versus 64.2% respectively, p = 0.006, aOR=0.65, 95% CI:0.41–1.01). However, LBR per cycle initiated was significantly higher in Seq-SET group (78.9% versus 64.2% respectively, p = 0.004, aHR=2.09, 95% CI:1.28–3.41). While only one monochorionic twin delivery was observed with Seq-SET (0.5%), 19 out of 70 (27.1%) live births after DET were twins. For women >35 of age (n = 296) the likelihood of a live birth per embryo transfer was lower in single compared to double embryo transfers (33.2% versus 46.2%, respectively, p = 0.012, aOR=0.58 95% CI:0.38–0.88). Although LBR per cycle initiated was higher in Seq-SET (58.2%) than DET (46.2%), the difference did not reach statistical significance (p = 0.054, aHR=1.62, 95% CI:1.00–2.60). While no twin delivery was observed with Seq-SET, 8 out of 86 (9.3%) live births with DET were twins.
Limitations, reasons for caution
This was a retrospective study with small sample size performed at a single fertility center, which may limit the generalizability of our findings. Cost-efficiency was not studied.
Wider implications of the findings: Seq-SET is associated with a comparable or higher likelihood of live birth per cycle initiated and a very low risk of twins when compared to DET. However, half of SET cases had to undergo two transfer cycles.
Trial registration number
NA
Collapse
Affiliation(s)
- S Ertas
- VKV American Hospital, Gyneacology and Obstetrics Department, Istanbul, Turkey
| | - B Balaban
- VKV American Hospital, Assisted Reproduction and Embryology Unit, Istanbul, Turkey
| | - B Urman
- Koc University, Gyneacology and Obstetrics Department, Istanbul, Turkey
| | - K Yakin
- Koc University, Gyneacology and Obstetrics Department, Istanbul, Turkey
| |
Collapse
|
4
|
Agarwal A, Chandrakumar R, Arafa M, Elbardisi H, Okada H, Suzuki K, Homa S, Killeen A, Balaban B, Ayaz A, Saleh R, Armagan A, Roychoudhury S, Sikka S. Multi-center evaluation of oxidation reduction potential assay in the infertile male. Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
5
|
Oktem O, Yakin K, Isiklar A, Balaban B, Urman B. Differential effect of ovarian hyperstimulation on the serum progesterone level, embryo quality and pregnancy rates: an analysis of 3,767 IVF cycles. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
6
|
Akin N, Bildik G, Guzel Y, Seyhan Ata A, Balaban B, Urman B, Oktem O. Activin-a promotes luteal regression by down-regulating the expression of steroidogenic enzymes and up-regulating BMP-6 and activin-A subunit in human luteal granulosa cells. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
7
|
Bildik G, Akin N, Guzel Y, Yakin K, Alper E, Ata AS, Balaban B, Urman B, Oktem O. Gonadotropin stimulation alters the expression of local growth factors in the granulosa cells involved in paracrine communication, dominant follicle selection and luteinization. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.1011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
8
|
Tel Adigüzel K, Akal Yildiz E, Kaner G, Adigüzel E, Balaban B. PP198-SUN: Determination of Nutritional Status in Children with Cerebral Palsy. Hacettepe University Institute of Health Sciences. Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50240-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
9
|
Fauser BCJM, Devroey P, Diedrich K, Balaban B, Bonduelle M, Delemarre-van de Waal HA, Estella C, Ezcurra D, Geraedts JPM, Howles CM, Lerner-Geva L, Serna J, Wells D. Health outcomes of children born after IVF/ICSI: a review of current expert opinion and literature. Reprod Biomed Online 2013; 28:162-82. [PMID: 24365026 DOI: 10.1016/j.rbmo.2013.10.013] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 10/03/2013] [Accepted: 10/08/2013] [Indexed: 01/28/2023]
Abstract
The Sixth Evian Annual Reproduction (EVAR) Workshop Group Meeting was held to evaluate the impact of IVF/intracytoplasmic sperm injection on the health of assisted-conception children. Epidemiologists, reproductive endocrinologists, embryologists and geneticists presented data from published literature and ongoing research on the incidence of genetic and epigenetic abnormalities and congenital malformations in assisted-conception versus naturally conceived children to reach a consensus on the reasons for potential differences in outcomes between these two groups. IVF-conceived children have lower birthweights and higher peripheral fat, blood pressure and fasting glucose concentrations than controls. Growth, development and cognitive function in assisted-conception children are similar to controls. The absolute risk of imprinting disorders after assisted reproduction is less than 1%. A direct link between assisted reproduction and health-related outcomes in assisted-conception children could not be established. Women undergoing assisted reproduction are often older, increasing the chances of obtaining abnormal gametes that may cause deviations in outcomes between assisted-conception and naturally conceived children. However, after taking into account these factors, it is not clear to what extent poorer outcomes are due to the assisted reproduction procedures themselves. Large-scale, multicentre, prospective epidemiological studies are needed to investigate this further and to confirm long-term health consequences in assisted-conception children. Assisted reproduction treatment is a general term used to describe methods of achieving pregnancy by artificial means and includes IVF and sperm implantation. The effect of assisted reproduction treatment on the health of children born using these artificial methods is not fully understood. In April 2011, fertility research experts met to give presentations based on research in this area and to look carefully at the evidence for the effects of assisted reproduction treatment on children's health. The purpose of this review was to reach an agreement on whether there are differences in the health of assisted-conception children with naturally conceived children. The researchers discovered no increased risk in birth defects in assisted-conception children compared with naturally conceived children. They found that IVF-conceived children have lower birth weights and higher fat under the skin, higher blood pressure and higher fasting glucose concentrations than naturally conceived children; however, growth, development and cognitive function are similar between groups. A very low risk of disorders of genetic control was observed in assisted-conception children. Overall, there did not appear to be a direct link between assisted reproduction treatment and children's health. The researchers concluded that the cause of some differences in the health of children conceived using assisted reproduction treatment may be due to the age of the woman receiving treatment. Large-scale, research studies are needed to study the long-term health of children conceived using assisted reproduction treatment.
Collapse
Affiliation(s)
- B C J M Fauser
- Department of Reproductive Medicine and Gynaecology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands.
| | - P Devroey
- Center for Reproductive Medicine, Vrije Universiteit Brussel, Laarbeeklaan 101, 1090 Brussels, Belgium
| | - K Diedrich
- Department of Obstetrics and Gynecology, University Clinic of Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany
| | - B Balaban
- Assisted Reproduction Unit, American Hospital of Istanbul, Guzelbahce Sokak No 20, Nisantasi, Istanbul 34365, Turkey
| | - M Bonduelle
- Centre for Medical Genetics, Vrije Universiteit Brussel, Laarbeeklaan 101, 1090 Brussels, Belgium
| | | | - C Estella
- Fundación Instituto Valenciano de Infertilidad (FIVI), Valencia University, and Instituto Universitario IVI/INCLIVA, Parc Científic Universitat de València C/Catedrático Agustín Escardino n(o) 9, Edificio 3, 46980 Paterna, Spain; Departamento de Biología Molecular and Centro de Biología Molecular 'Severo Ochoa' (CSIC-UAM), Universidad Autónoma de Madrid, Madrid, Spain
| | - D Ezcurra
- Global Development and Medical Unit, Merck Serono SA Geneva, Chemin des Mines 9, 1202 Geneva, Switzerland
| | - J P M Geraedts
- Department of Genetics and Cell Biology, Research Institute GROW, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - C M Howles
- Global Development and Medical Unit, Merck Serono SA Geneva, Chemin des Mines 9, 1202 Geneva, Switzerland
| | - L Lerner-Geva
- Woman and Child Health Research Unit, Gertner Institute for Epidemiology and Health Policy Research, Tel Hashomer 52621, Israel
| | - J Serna
- Instituto Valenciano de Infertilidad (IVI) Zaragoza, C/María Zambrano, 31, 50018 Zaragoza, Spain
| | - D Wells
- University of Oxford, Nuffield Department of Obstetrics and Gynaecology, Women's Centre, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | | |
Collapse
|
10
|
Davies S, Christopikou D, Tsorva E, Karagianni A, Handyside AH, Mastrominas M, Alfarawati S, Poli M, Wells D, Fragouli E, Fragouli E, Alfarawati S, Konstantinidis M, Jaroudi S, Wells D, Van den Abbeel E, Balaban B, Ziebe S, Lundin K, Klein BM, Helmgaard L, Arce JC, Yokota Y, Yokota M, Yokota H, Sato S, Nakagawa M, Sato M, Anazawa I, Araki Y, Ledee N, Gridelet V, Ravet S, Jouan C, Gaspard O, Wenders F, Thonon F, Hincourt N, Dubois M, Foidart JM, Frankenne F, Munaut C, Perrier d'hauterive S, van Loendersloot LL, Van Wely M, van der Veen F, Bossuyt PMM, Repping S. SESSION 59: EMBRYOLOGY - DEVELOPMENT AND QUALITY. Hum Reprod 2012. [DOI: 10.1093/humrep/27.s2.58] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
11
|
|
12
|
Baydar O, Balaban B, Coskun U, Ersanli M, Firatli I, çetin G, Küçükoglu M. PP-427 A CASE OF SUCCESSFUL SURGICAL RESECTION OF LEFT VENTRICULAR PSEUDOANEURYSM AFTER AORTIC VALVE REPLACEMENT. Int J Cardiol 2012. [DOI: 10.1016/s0167-5273(12)70545-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
13
|
van Mello NM, Mol F, Horne AW, Abidin HBZ, Adin ZEHA, Boswell L, Brown JK, Burgess S, Lee KF, Duncan WC, Akhtar M, Oktem O, Mercan R, Alper E, Salar Z, Balaban B, Urman B. SESSION 50: EARLY PREGNANCY - NEW EVIDENCE. Hum Reprod 2012. [DOI: 10.1093/humrep/27.s2.49] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
14
|
Van den Abbeel E, Balaban B, Lundin K, Ziebe S, Helmgaard L, Arce JC. Blastocyst quality in relation to pregnancy rate and early pregnancy loss. Fertil Steril 2011. [DOI: 10.1016/j.fertnstert.2011.07.394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
15
|
Ziebe S, Van den Abbeel E, Balaban B, Lundin K, Helmgaard L, Arce JC. Blastocyst quality according to embryo development on days 3 and 4. Fertil Steril 2011. [DOI: 10.1016/j.fertnstert.2011.07.940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
16
|
Seckin B, Aydur E, Balaban B, Coguplugil A, Möhür H, Dayanc M. UP-01.069 Does Transobturator Tape Procedure Affect Walking? A Prospective Study with 3D Computerized Gait Analysis. Urology 2011. [DOI: 10.1016/j.urology.2011.07.621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
17
|
Fancsovits P, Murber A, Tothne Gilan Z, Rigo J, Urbancsek J, Balaban B, Yakin K, Ata B, Isiklar A, Urman B, Konstantinidis M, Alfarawati S, Hurd D, Wells D, Griffin DK, Gabriel AS, Ottolini CS, Thornhill AR, Gordon A, Brown APC, Taylor J, Bennett K, Handyside AH, Handyside AH, Geraedts JPM, Montag M, Magli MC, Repping S, Staessen C, Harper J, Schmutzler A, Collins J, Goossens V, van der Ven H, Vesela K, Gianaroli L. SELECTED ORAL COMMUNICATION SESSION, SESSION 17: EMBRYOLOGY AND GENETICS, Monday 4 July 2011 15:15 - 16:30. Hum Reprod 2011. [DOI: 10.1093/humrep/26.s1.17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
18
|
Balaban B, Isiklar A, Urman B, Gardner D, Larman M. Vitrification of human and mouse embryos using the Rapid-i™. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
19
|
Oktem O, Mercan R, Balaban B, Urman B. Comparison of IVF outcomes between GnRH antagonist and GnRH agonist long protocols in normo responder IVF patients. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.1004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
20
|
Yaşar E, Tok F, Taşkaynatan MA, Yilmaz B, Balaban B, Alaca R. The effects of phenol neurolysis of the obturator nerve on the distribution of buttock-seat interface pressure in spinal cord injury patients with hip adductor spasticity. Spinal Cord 2010; 48:828-31. [PMID: 20386553 DOI: 10.1038/sc.2010.34] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVES Hip adductor spasticity may adversely effect shear-force and pressure distribution on the buttocks, where ulcerations most frequently appear in patients with spinal cord injury (SCI). Phenol neurolysis of the obturator nerve (ON) is commonly used to manage hip adductor spasticity. This study aimed to determine the effects on the distribution of buttock-seat interface pressure (BSIP) in a group of SCI patients with adductor spasticity that underwent ON blockade with phenol. METHODS We reviewed the records of SCI patients that were admitted to our clinic between January 2009 and December 2009. BSIP values (obtained with an X-sensor 48) and hip adductor spasticity levels of SCI patients with hip adductor spasticity that underwent ON blockade with phenol were collected. BSIP distributions of the patients were divided into two portions: first one is the BSIP distribution at the pressure ≤37 mm Hg, and the second one is at the pressure >37 mm Hg. RESULTS The study included 20 SCI patients (19 males and 1 female), with a mean age of 42.85±13.24 years. Although the percentage of BSIP distribution at ≤37 mm Hg range increased significantly (P<0.001), after ON neurolysis, BSIP distribution at >37 mm Hg range decreased significantly (P<0.001). In addition, mean hip adductor spasticity decreased significantly after ON neurolysis (P<0.001). CONCLUSION Phenol neurolysis of the ON is a promising treatment for the management of hip adductor spasticity in SCI patients and also has positive effects on BSIP, which has a crucial function in the development of pressure ulcers.
Collapse
Affiliation(s)
- E Yaşar
- Department of Physical Medicine and Rehabilitation, Gulhane Military Medical Academy, GMMA TAF Rehabilitation Center, Ankara, Turkey.
| | | | | | | | | | | |
Collapse
|
21
|
Balaban B, Yakin K, Isiklar A, Sahin M, Urman B. Clinical outcome of ICSI using morphologically selected spermatozoa by high power magnification: a prospective randomized study. Fertil Steril 2009. [DOI: 10.1016/j.fertnstert.2009.07.338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
22
|
Larman M, Balaban B, Isiklar A, Urman B, Gardner D. Vitrification of human and mouse embryos using super-cooled air. Fertil Steril 2009. [DOI: 10.1016/j.fertnstert.2009.07.275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
23
|
Urman B, Ata B, Yakin K, Alatas C, Aksoy S, Mercan R, Balaban B. Luteal phase empirical low molecular weight heparin administration in patients with failed ICSI embryo transfer cycles: a randomized open-labeled pilot trial. Hum Reprod 2009; 24:1640-7. [PMID: 19357135 DOI: 10.1093/humrep/dep086] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND The pathology underlying recurrent implantation failures (RIF) is not clear and treatment options proposed are generally not evidence based. Although the effect of heparin on trophoblast biology has not been studied extensively, given the available data suggesting a possible beneficial effect of heparin on embryo implantation, we decided to undertake this pilot study. METHODS One hundred and fifty women with > or =2 failed assisted reproduction treatment cycles were included in this randomized open-label pilot trial. Participants underwent controlled ovarian stimulation with the long protocol and were randomly allocated to receive 1 mg/kg/day low molecular weight heparin (LMWH) or no treatment in addition to routine luteal phase support (LPS) on the day after oocyte retrieval. LPS and LMWH was continued up to the 12th gestational week in pregnant participants. RESULTS There were 26 (34.7%) live births in the LMWH group, and 20 (26.7%) in the control group (absolute difference 8.0%, 95% CI -4.2 to 24.9%, P = 0.29). There were 34 (45.3%) and 29 (38.7%) clinical pregnancies in the LMWH and control groups, respectively (absolute difference 6.6%, 95% CI -9.0 to 21.8%, P = 0.41). Implantation rates were 24.5 and 19.8% in the LMWH and control groups, respectively (absolute difference 4.7%, 95% CI -4.7 to 14.1%, P = 0.33). CONCLUSION Despite lack of statistical significance, observed relative increase by 30% in live birth rates with LMWH may be regarded as a clinically significant trend necessitating further research on the use of empirical LMWH in women with RIF and possibly in all women undergoing assisted reproduction treatment. Failure to demonstrate statistical significance of the observed treatment difference may be due to limited sample size of this pilot study.
Collapse
Affiliation(s)
- B Urman
- Assisted Reproduction Unit of the American Hospital of Istanbul, Guzelbahce Sokak No 20, Nisantasi, Istanbul 34365, Turkey.
| | | | | | | | | | | | | |
Collapse
|
24
|
Erçelen N, Comert H, Erkan L, Ilbay O, Mercan R, Balaban B, Isiklar A, Urman B. Outcomes of PGD for single gene disorders. Reprod Biomed Online 2009. [DOI: 10.1016/s1472-6483(10)61247-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
25
|
Balaban B, Urman B, Ata B, Isiklar A, Larman MG, Hamilton R, Gardner DK. A randomized controlled study of human Day 3 embryo cryopreservation by slow freezing or vitrification: vitrification is associated with higher survival, metabolism and blastocyst formation. Hum Reprod 2008; 23:1976-82. [PMID: 18544577 DOI: 10.1093/humrep/den222] [Citation(s) in RCA: 187] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The aim of this study was to compare two methods of cryopreservation for the cleavage-stage human embryo: slow freezing and vitrification. METHODS A total of 466 Day 3 embryos, donated with consent, underwent cryopreservation by either slow freezing in straws or vitrification using the cryoloop. The vitrification procedure did not include dimethyl sulfoxide, but rather employed ethylene glycol and 1,2-propanediol as the cryoprotectants. Survival, embryonic metabolism and subsequent development to the blastocyst were used to determine the efficacy of the two procedures. RESULTS Significantly, more embryos survived the vitrification procedure (222/234, 94.8%) than slow freezing (206/232, 88.7%; P < 0.05). Consistent with this observation, pyruvate uptake was significantly greater in the vitrification group, reflecting a higher metabolic rate. Development to the blastocyst was also higher following vitrification (134/222, 60.3%) than following freezing (106/206, 49.5%; P < 0.05). In a separate cohort of 73 patients who had their supernumerary embryos cyropreserved with vitrification, the resulting implantation rate and clinical pregnancy rate were 30 and 49%, respectively. CONCLUSIONS Analysis of metabolism revealed that vitrification had less impact on the metabolic rate of the embryo than freezing, which was reflected in higher survival rate and subsequent development in vitro. Excellent pregnancy outcomes followed the warming and transfer of vitrified cleavage-stage embryos. These data provide further evidence that vitrification imparts less trauma to cells and is, therefore, a more effective means of cryopreserving the human embryo than conventional slow freezing. Clinicaltrials.gov identifier: NCT00608010.
Collapse
Affiliation(s)
- B Balaban
- Assisted Reproduction Unit, American Hospital of Istanbul, Guzelbahce Sokak 20, Nisantasi, Istanbul 34365, Turkey
| | | | | | | | | | | | | |
Collapse
|
26
|
Balaban B, Ata B, Isiklar A, Yakin K, Urman B. Severe cytoplasmic abnormalities of the oocyte decrease cryosurvival and subsequent embryonic development of cryopreserved embryos. Hum Reprod 2008; 23:1778-85. [PMID: 18477573 DOI: 10.1093/humrep/den127] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Abnormalities of oocyte morphology affect embryo quality and viability. Whether morphological abnormalities of the oocyte influence cryosurvival and further development of derived embryos is not known. The aim of this study was to compare cryosurvival and progression to the blastocyst stage of frozen-thawed embryos derived from normal and abnormal oocytes. METHODS A total of 5292 Grade 1 and 2 embryos from 964 women were frozen, thawed and subsequently cultured up to the blastocyst stage. The study was performed on excess embryos from patients who did not opt for cryopreservation. Cryosurvival, progression to the blastocyst stage and hatching were correlated with morphological characteristics of the oocytes that embryos were derived from. RESULTS Presence of a cytoplasmic abnormality of the oocyte significantly decreased cryosurvival. This detrimental effect was more pronounced in embryos derived from oocytes with vacuolar cytoplasm or with central granulation. Furthermore, these embryos did not have the potential to develop into good quality blastocysts or reach the hatching stage. On the other hand, presence of a single extracytoplasmic abnormality of the oocyte did not affect cryosurvival and the potential to develop into good quality blastocysts. Grade 2 embryos derived from oocytes with irregular shape or a large perivitelline space had decreased cryosurvival. However when these embryos survived cryopreservation, their potential to develop good quality blastocysts or to reach hatching stage was unaffected. CONCLUSIONS Embryos derived from oocytes with vacuolar cytoplasm or central granulation do not seem to bear the potential to develop good quality blastocysts or to reach hatching stage after cryopreservation. The presence of extracytoplasmic abnormalities alone does not affect blastocyst development despite decreasing cryosurvival.
Collapse
Affiliation(s)
- B Balaban
- Assisted Reproduction Unit, American Hospital of Istanbul, Guzelbahce Sokak No 20, Nisantasi, Istanbul 34365, Turkey
| | | | | | | | | |
Collapse
|
27
|
Ata B, Yakin K, Balaban B, Urman B. GnRH agonist protocol administration in the luteal phase in ICSI-ET cycles stimulated with the long GnRH agonist protocol: a randomized, controlled double blind study. Hum Reprod 2008; 23:668-73. [PMID: 18192671 DOI: 10.1093/humrep/dem421] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND GnRH agonist administration in the luteal phase was reported to beneficially affect the clinical outcome of intracytoplasmic sperm injection (ICSI) and embryo transfer (ET) cycles. This double blind, randomized, placebo controlled trial evaluates whether a single dose GnRH agonist administered 6 days after ICSI increases ongoing pregnancy rates following ET in cycles stimulated with the long GnRH agonist protocol. METHODS Five hundred and seventy women undergoing ET following controlled ovarian stimulation with a long GnRH agonist protocol were included. In addition to routine luteal phase support with progesterone, women were randomized to receive a single 0.1 mg dose of triptorelin or placebo 6 days after ICSI. Randomization was done on the day of ET according to a computer generated randomization table. Ongoing pregnancy rate beyond 20th week of gestation was the primary outcome measure. The trial was powered to detect a 12% absolute increase from an assumed 38% ongoing pregnancy rate in the placebo group, with an alpha error level of 0.05 and a beta error level of 0.2. RESULTS There were 89 (31.2%) ongoing pregnancies in the GnRH agonist group, and 84 (29.5%) in the control group (absolute difference +1.7%, 95% confidence interval -5.8% to +9.2%). Implantation, clinical pregnancy and multiple pregnancy rates were likewise similar in the GnRH agonist and placebo groups. CONCLUSIONS Single 0.1 mg triptorelin administration 6 days after ICSI following ovarian stimulation with the long GnRH agonist protocol does not seem to result in an increase >or=12% in ongoing pregnancy rates.
Collapse
Affiliation(s)
- B Ata
- Assisted Reproduction Unit, American Hospital of Istanbul, Guzelbahce Sokak No. 20, Nisantasi, Istanbul 34365, Turkey.
| | | | | | | |
Collapse
|
28
|
Ercelen N, Comert H, Erkan L, Ilbay O, Mercan R, Balaban B, Isiklar A, Urman B. 7.018 Outcomes of preimplantation genetic diagnosis for single gene disorders. Reprod Biomed Online 2008. [DOI: 10.1016/s1472-6483(10)61418-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
29
|
Balaban B, Urman B, Isiklar A, Larman M, Hamilton B, Gardner D. Freezing of cleavage stage human embryos negatively impacts metabolism compared to cryopreservation by vitrification. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
30
|
Balaban B, Isiklar A, Ata B, Yakin K, Urman B. The effect of the embryologist/technician on fertilization rate and embryo quality following ICSI and pregnancy rate following embryo transfer procedures. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
31
|
Balaban B, Ata B, Isiklar A, Yakin K, Urman B. Blastocyst development of cryopreserved embryos derived from oocytes with various morphological abnormalities. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.1172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
32
|
Cincik M, Ergur AR, Tutuncu L, Muhcu M, Kilic M, Balaban B, Urman B. Combination of hypoosmotic swelling/eosin Y test for sperm membrane integrity evaluation: correlations with other sperm parameters to predict ICSI cycles. Arch Androl 2007; 53:25-8. [PMID: 17364461 DOI: 10.1080/01485010600888912] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The objective of our study was to evaluate the accuracy of the combination of hypoosmotic swelling (HOS) and eosin Y (Ey) exclusion tests to predict the ICSI cycles' outcome and its correlations with other sperm parameters. The functional and structural integrity of sperm membrane was evaluated with the combined HOS/Ey test in 95 ICSI cycles and the results were correlated with other sperm parameters, including concentration, motility, strict morphology, and total motile sperm count. The combined HOS/Ey test was evaluated for the prediction of the ICSI cycles' outcome parameters including fertilization, cleavage, and pregnancy rates. The HOS/Ey test presented significant relationships with concentration, motility, and strict morphology (p < 0,0001) but it couldn't predict the fertilization, cleavage, and pregnancy outcomes of ICSI cycles. The combined HOS/Ey test has strong correlations with motility and strict morphology parameters of sperm samples but is not sufficiently sensitive to estimate the outcome of ICSI cycles.
Collapse
Affiliation(s)
- M Cincik
- Department of Obstetrics and Gynecology, Gulhane Military Medical Academy, Haydarpasa Training Hospital, Istanbul, Turkey.
| | | | | | | | | | | | | |
Collapse
|
33
|
|
34
|
Ata B, Yakın K, Balaban B, Urman B. P-66. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
35
|
Urman B, Ata B, Alatas C, Mercan R, Isiklar A, Balaban B. P-309. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
36
|
Balaban B, Urman B, Yakin K, Isiklar A, Bozdag H, Mumcu A. A prospective randomized comparison of two sequential culture media; G1.2/G2.2 versus GIII series. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
37
|
Balaban B, Urman B, Yakin K, Isiklar A, Gursoy H, Alatas C. Hyaluronan enriched transfer medium is more beneficial in advanced maternal age. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
38
|
Balaban B, Isiklar A, Gursoy H, Kilic Y, Bozdag H, Urman B. Blastocyst formation and pregnancy outcome following embryo selection using a scoring system specific for day 3 embryos. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
39
|
Balaban B, Urman B, Yakin K, Isiklar A, Kilic Y, Aksoy S. High pregnancy and implantation rates can be achieved in blastocyst transfers using hyaluronan enriched culture and transfer medium. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
40
|
Urman B, Balaban B, Yakin K, Isiklar A, Alatas C, Aksoy S. The outcome of frozen-thawed embryo transfer cycles according to the outcome of fresh embryo transfer cycles. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
41
|
Abstract
BACKGROUND There is a growing awareness of potential problems in exposing sperm to polyvinylpyrrolidone (PVP) to slow their motility, a procedure commonly used prior to ICSI. The study presented here evaluates an alternative product for slowing sperm motility, which contains hyaluronate, a substance found naturally in the reproductive tract. METHODS Computerized sperm motility analysis was used to compare the motilities of sperm exposed to either a PVP-containing product (ICSI-100), or a hyaluronate-containing product (SpermCatch), or control sperm resuspended in a sperm maintenance medium. A subjective assessment was made of the ease with which sperm could be isolated and be drawn into, and expelled from, an injection pipette after having their tails nicked. Sperm exposed to either ICSI-100 or SpermCatch were used for ICSI. Fertilization rate, zygote development, grading, and outcome of transfer were recorded for the two treatment groups. RESULTS The hyaluronate-containing product slowed sperm motility sufficiently for the sperm to be captured in an injection pipette, was easy to draw into and expel from the pipette, prevented sperm sticking to plastic or glassware, and did not affect post-injection zygote development. Clinical pregnancy rates were similar for the two groups. CONCLUSIONS This product represents an alternative to PVP for slowing sperm motility prior to ICSI.
Collapse
|
42
|
Balaban B, Urman B, Isiklar A, Alatas C, Aksoy S, Mercan R, Mumcu A, Nuhoglu A. The effect of pronuclear morphology on embryo quality parameters and blastocyst transfer outcome. Hum Reprod 2001; 16:2357-61. [PMID: 11679520 DOI: 10.1093/humrep/16.11.2357] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Embryo quality may be accurately assessed as early as the pronuclear zygote phase, as shown in recent studies. However, it is not known whether good quality zygotes are destined to become good quality cleavage stage embryos and blastocysts. METHODS In this retrospective study, 86 intracytoplasmic sperm injection-embryo transfer cycles were studied where each available embryo was scored from the zygote until the blastocyst stage. Embryonic normality parameters such as pronuclear pattern, early cleavage, cleavage stage embryo grade, the presence of embryos with > or =8 cells on day 3 and blastocyst quality were recorded. Embryo transfer was undertaken at the blastocyst stage and the outcome was studied according to the pronuclear pattern exhibited by the zygotes. RESULTS Embryos that showed an ideal pronuclear pattern (0 PN pattern) cleaved earlier and faster and resulted in better quality cleavage stage embryos and blastocysts. The incidence of blastocyst formation was 72% in zygotes showing a 0 PN pattern, compared with 12.7% in zygotes with double pronuclear abnormality. Higher implantation and pregnancy rates were obtained when at least one blastocyst derived from a 0 PN pattern zygote was included in the set of embryos to be transferred. CONCLUSIONS Our results indicate that the pronuclear pattern of the zygote is closely related to blastocyst formation and quality. Blastocysts derived from 0 PN zygotes have a higher potential for implantation.
Collapse
Affiliation(s)
- B Balaban
- The Assisted Reproduction Unit, American Hospital of Istanbul, Turkey
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Urman B, Balaban B, Alatas C, Aksoy S, Isiklar A, Mercan R. Different assisted hatching (AH) methods yield similar implantation and pregnancy rates following IVF/ICSI. Fertil Steril 2001. [DOI: 10.1016/s0015-0282(01)02540-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
44
|
Balaban B, Urman B, Isiklar A, Alatas C, Aksoy S, Mercan R. The effect of polar body (PB) morphology on embryo quality, implantation and pregnancy rates. Fertil Steril 2001. [DOI: 10.1016/s0015-0282(01)02035-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
45
|
Balaban B, Urman B, Isiklar A, Aksoy S, Mumcu A, Nuhoglu A. Embryo characteristics and the outcome of day 3 embryo transfer related to pronuclear morphology (PNM) in ejaculate ICSI cycles. Fertil Steril 2001. [DOI: 10.1016/s0015-0282(01)02058-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
46
|
Urman B, Balaban B, Alatas C, Aksoy S, Isiklar A. Cleavage stage versus blastocyst transfer in ICSI cycles of azoospermic couples. Fertil Steril 2001. [DOI: 10.1016/s0015-0282(01)02049-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
47
|
El-Maarri O, Buiting K, Peery EG, Kroisel PM, Balaban B, Wagner K, Urman B, Heyd J, Lich C, Brannan CI, Walter J, Horsthemke B. Maternal methylation imprints on human chromosome 15 are established during or after fertilization. Nat Genet 2001; 27:341-4. [PMID: 11242121 DOI: 10.1038/85927] [Citation(s) in RCA: 161] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Prader-Willi syndrome (PWS) is a neurogenetic disorder that results from the lack of transcripts expressed from the paternal copy of the imprinted chromosomal region 15q11-q13 (refs. 1,2). In some patients, this is associated with a deletion of the SNURF-SNRPN exon 1 region inherited from the paternal grandmother and the presence of a maternal imprint on the paternal chromosome. Assuming that imprints are reset in the germ line, we and others have suggested that this region constitutes part of the 15q imprinting center (IC) and is important for the maternal to paternal imprint switch in the male germ line. Here we report that sperm DNA from two males with an IC deletion had a normal paternal methylation pattern along 15q11-q13. Similar findings were made in a mouse model. Our results indicate that the incorrect maternal methylation imprint in IC deletion patients is established de novo after fertilization. Moreover, we found that CpG-rich regions in SNURF-SNRPN and NDN, which in somatic tissues are methylated on the maternal allele, are hypomethylated in unfertilized human oocytes. Our results indicate that the normal maternal methylation imprints in 15q11-q13 also are established during or after fertilization.
Collapse
Affiliation(s)
- O El-Maarri
- Max-Planck-Institut für Molekulare Genetik, Berlin, Germany
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Balaban B, Urman B, Alatas C, Mercan R, Aksoy S, Isiklar A. Blastocyst-stage transfer of poor-quality cleavage-stage embryos results in higher implantation rates. Fertil Steril 2001; 75:514-8. [PMID: 11239534 DOI: 10.1016/s0015-0282(00)01756-8] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To determine the feasibility and success of blastocyst-stage embryo transfers in patients having only fair and poor quality cleavage-stage embryos on day 3. DESIGN Prospective case study with historic controls. SETTING Tertiary care private hospital IVF center. PATIENT(S) A total of 158 day 5 embryo transfer cycles in patients with grade 3 and grade 4 cleavage-stage embryos. Control group consisted of 162 day 3 transfer cycles performed with embryos of similar quality. INTERVENTION(S) In vitro culture of embryos up to the blastocyst stage. MAIN OUTCOME MEASURE(S) The percentage of cycles that culminated in the transfer of at least one blastocyst and implantation and pregnancy rate related to the day of transfer. RESULT(S) In the day 3 transfer group, a mean of 5.2 embryos were replaced per patient. This was significantly more than the mean of 2.4 embryos that could be replaced on day 5 (P <.001). The clinical pregnancy rate per embryo transfer was 27.2% and 33.5% in the two groups, respectively (P >.05). The implantation rate per embryo was significantly higher in the day 5 transfer group (15% vs. 5.9%). The multiple pregnancy and abortion rates were similar between the groups. CONCLUSION(S) Transfer of fair and poor quality embryos at the blastocyst stage is feasible and is associated with higher implantation rates as compared to transfer of similar quality embryos on day 3.
Collapse
Affiliation(s)
- B Balaban
- Assisted Reproduction Unit, American Hospital of Istanbul, Turkey
| | | | | | | | | | | |
Collapse
|
49
|
Balaban B, Urman B, Isiklar A, Alatas C, Mercan R, Aksoy S, Nuhoglu A. Blastocyst transfer following intracytoplasmic injection of ejaculated, epididymal or testicular spermatozoa. Hum Reprod 2001; 16:125-129. [PMID: 11139550 DOI: 10.1093/humrep/16.1.125] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Recent studies indicate a strong paternal influence on embryo development and progression of the embryo to the blastocyst stage. The aim of this study was to compare, during extended culture, the in-vitro development of embryos resulting from intracytoplasmic sperm injection (ICSI) of ejaculated spermatozoa (group 1, n = 347), epididymal (group 2, n = 22) or testicular (group 3, n = 18) spermatozoa from obstructive azoospermic and testicular spermatozoa from non-obstructive azoospermic (group 4, n = 31) subjects. Fertilization and blastocyst formation rates were significantly lower in group 4 (P < 0.05). The incidence of expanded and hatching blastocysts was significantly lower in group 4 (P < 0.05). Overall in 93.2% ejaculate ICSI cycles, blastocysts were transferred on day 5. This was significantly higher than the 62% day 5 transfers in the non-obstructive azoospermic group (P < 0.05). Implantation rate per embryo was significantly higher in the ejaculate ICSI group compared with the other groups (P < 0.05). Clinical pregnancy per transfer was similar between groups; however, significantly fewer multiple pregnancies were encountered in the non-obstructive azoospermic group (P < 0.01). In conclusion, the source of the spermatozoa, most likely to be indicative of the severity of spermatogenic disorder, affects the rate of blastocyst formation and blastocyst implantation. Spermatozoa from non-obstructive azoospermic subjects, when utilized for ICSI, result in embryos that progress to the blastocyst stage at a lower and slower rate and implant less efficiently.
Collapse
Affiliation(s)
- B Balaban
- Assisted Reproduction Unit, American Hospital of Istanbul, Turkey
| | | | | | | | | | | | | |
Collapse
|
50
|
Urman B, Mercan R, Alatas C, Balaban B, Isiklar A, Nuhoglu A. Low-dose aspirin does not increase implantation rates in patients undergoing intracytoplasmic sperm injection: a prospective randomized study. J Assist Reprod Genet 2000; 17:586-90. [PMID: 11209540 PMCID: PMC3455451 DOI: 10.1023/a:1026491426423] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
PURPOSE The aim was to evaluate the effect of aspirin on pregnancy and implantation rates in an unselected group of patients undergoing intracytoplasmic sperm injection (ICSI). METHODS Two hundred and seventy-nine patients were randomized to receive 80 mg of aspirin (n = 139) or no treatment (r = 136) starting from the first day of controlled ovarian hyperstimulation. RESULTS Duration of stimulation, gonadotropin consumption, peak estradiol, number of oocytes retrieved, fertilization rate, cleavage rate, and number of embryos transferred were similar in the two groups. Implantation and clinical pregnancy rates were 15.6% and 39.6% versus 15.1% and 43.4% in aspirin treated and untreated groups, respectively (P > 0.05). CONCLUSIONS Low-dose aspirin administration does not improve implantation and pregnancy rates in an unselected group of patients undergoing ICSI.
Collapse
Affiliation(s)
- B Urman
- Assisted Reproduction Unit, VKV American Hospital of Istanbul, Guzelbahce Sok No. 2, Nisantasi 80200, Istanbul, Turkey
| | | | | | | | | | | |
Collapse
|