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Ma M, Zhang L, Liu Z, Teng Y, Li M, Peng X, An L. Effect of blastocyst development on hatching and embryo implantation. Theriogenology 2024; 214:66-72. [PMID: 37857152 DOI: 10.1016/j.theriogenology.2023.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 10/11/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023]
Abstract
The mammalian zygote, formed after a sperm fertilizes an egg, undergoes several rounds of mitosis and morphogenesis to form the blastocyst. During the peri-implantation period, the blastocyst hatches out of the zona pellucida (ZP) and invades the receptive uterine endometrium. This process promotes maternal-fetal dialogue at the physiological and molecular level, thereby initiating the implantation process. Blastocyst hatching is a consequence of elevated osmotic pressure due to active Na+/K+ ion transporter in the blastocyst cavity, as well as proteases produced by trophectoderm (TE) that hydrolyze the ZP. This review summarizes the process underpinning blastocyst hatching, such as the hatching schedule, the location of TEs during initial hatching out of the ZP, the molecules involved in blastocyst hatching, and how these processes affect implantation events. Additionally, we focus on identifying crucial molecules that may influence the quality of implantation and predict the outcome of embryo implantation. Further understanding the mechanism of these molecules may help us to improve the efficiency of Assisted reproductive technology (ART) in livestock breeding. This review provides insight into embryonic development, specifically during the short-term process of blastocyst hatching and its effects on the following implantation.
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Affiliation(s)
- Meixiang Ma
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, 830046, China
| | - Liang Zhang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, 830046, China
| | - Zihan Liu
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, 830046, China
| | - Yadi Teng
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, 830046, China
| | - Miaolong Li
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, 830046, China
| | - Xinrong Peng
- Institute of Animal Biotechnology, Xinjiang Academy of Animal Science, Urumqi, 830011, China.
| | - Liyou An
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, 830046, China.
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Cimadomo D, Rienzi L, Capalbo A, Rubio C, Innocenti F, García-Pascual CM, Ubaldi FM, Handyside A. The dawn of the future: 30 years from the first biopsy of a human embryo. The detailed history of an ongoing revolution. Hum Reprod Update 2020; 26:453-473. [PMID: 32441746 DOI: 10.1093/humupd/dmaa019] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 03/25/2020] [Indexed: 01/20/2023] Open
Abstract
Following early studies showing no adverse effects, cleavage stage biopsy by zona drilling using acid Tyrode's solution, and removal of single blastomeres for preimplantation genetic testing (PGT) and identification of sex in couples at risk of X-linked disease, was performed by Handyside and colleagues in late 1989, and pregnancies reported in 1990. This method was later used for specific diagnosis of monogenic conditions, and a few years later also for chromosomal structural and/or numerical impairments, thereby establishing a valuable alternative option to prenatal diagnosis. This revolutionary approach in clinical embryology spread worldwide, and several other embryo biopsy strategies developed over three decades in a process that is still ongoing. The rationale of this narrative review is to outline the different biopsy approaches implemented across the years in the workflow of the IVF clinics that provided PGT: their establishment, the first clinical experiences, their downsides, evolution, improvement and standardization. The history ends with a glimpse of the future: minimally/non-invasive PGT and experimental embryo micromanipulation protocols. This grand theme review outlines a timeline of the evolution of embryo biopsy protocols, whose implementation is increasing worldwide together with the increasing application of PGT techniques in IVF. It represents a vade mecum especially for the past, present and upcoming operators and experts in this field to (re)live this history from its dawn to its most likely future.
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Affiliation(s)
- Danilo Cimadomo
- Clinica Valle Giulia, Genera Center for Reproductive Medicine, Rome, Italy
| | - Laura Rienzi
- Clinica Valle Giulia, Genera Center for Reproductive Medicine, Rome, Italy
| | - Antonio Capalbo
- Igenomix Italy, Marostica, Italy.,Dipartimento di Scienze Anatomiche, Istologiche, Medico Legali e dell'Apparato Locomotore, Sezione Istologia ed Embriologia Medica, University of Rome 'Sapienza', Rome, Italy
| | - Carmen Rubio
- R&D Department, Igenomix and Incliva, Valencia, Spain
| | - Federica Innocenti
- Clinica Valle Giulia, Genera Center for Reproductive Medicine, Rome, Italy
| | | | | | - Alan Handyside
- School of Biosciences, University of Kent, Canterbury, UK
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Aoyama N, Kato K. Trophectoderm biopsy for preimplantation genetic test and technical tips: A review. Reprod Med Biol 2020; 19:222-231. [PMID: 32684821 PMCID: PMC7360970 DOI: 10.1002/rmb2.12318] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 12/19/2019] [Accepted: 01/08/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Recently, the Japan Society of Obstetrics and Gynecology initiated a clinical study of preimplantation genetic test for aneuploidy. There will be a great need for a standardized embryo biopsy technique in Japan. However, the gold standard trophectoderm (TE) biopsy procedure has not been established, and this review outlines the clinical use of TE biopsy. METHODS Based on literature, the method and associated techniques for TE biopsy, a dissection method of TE cells from blastocysts, were investigated. MAIN FINDINGS Two TE biopsy methods are used, namely assisted hatching (herniating) and non-assisted hatching (direct suction); however, it is not clear which of these methods is superior. It is critical to understand whether the flicking or pulling method is beneficial. CONCLUSION Non-assisted hatching biopsy method may cause blastocyst collapse with a higher probability, and it may extend the biopsy time. The biopsy procedure should be performed within 3 minutes, and thus direct TE suction may have greater disadvantages. It is a fact that pulling method of TE dissection with laser pulse is simple; however, excess laser shots may induce a higher frequency of mosaicism. It is important to understand that each technique of TE biopsy has benefits and disadvantages.
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Davidson LM, Liu Y, Griffiths T, Jones C, Coward K. Laser technology in the ART laboratory: a narrative review. Reprod Biomed Online 2019; 38:725-739. [DOI: 10.1016/j.rbmo.2018.12.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 11/01/2018] [Accepted: 12/11/2018] [Indexed: 11/27/2022]
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Padula F, Capriglione S, Iaconianni P, Gatti S, Lippa A, Minutolo SE, Giannarelli D, Giorlandino C. Laser-assisted hatching of human embryos: may two alternative approaches (thinning versus drilling) impact on implant rate? Lasers Med Sci 2017; 32:1663-1666. [PMID: 28547074 DOI: 10.1007/s10103-017-2242-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 05/19/2017] [Indexed: 11/30/2022]
Affiliation(s)
- Francesco Padula
- Department of Prenatal Diagnosis, Altamedica, Fetal-Maternal Medical Centre, Rome, Italy
| | - Stella Capriglione
- Department of Obstetrics and Gynaecology, Campus Bio Medico University, Via Alvaro del Portillo, 200, 00128, Rome, Italy.
| | - Paola Iaconianni
- Department of Reproductive Medicine, Altamedica, Fetal-Maternal Medical Centre, Rome, Italy
| | - Simona Gatti
- Department of Reproductive Medicine, Altamedica, Fetal-Maternal Medical Centre, Rome, Italy
| | - Assunta Lippa
- Department of Reproductive Medicine, Altamedica, Fetal-Maternal Medical Centre, Rome, Italy
| | | | - Diana Giannarelli
- Scientific Direction, Biostatistical Unit, Regina Elena National Cancer Institute, Rome, Italy
| | - Claudio Giorlandino
- Department of Prenatal Diagnosis, Altamedica, Fetal-Maternal Medical Centre, Rome, Italy
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Cedillo L, Ocampo-Bárcenas A, Maldonado I, Valdez-Morales FJ, Camargo F, López-Bayghen E. A simple, less invasive stripper micropipetter-based technique for day 3 embryo biopsy. FERTILITY RESEARCH AND PRACTICE 2016; 2:13. [PMID: 28620540 PMCID: PMC5424395 DOI: 10.1186/s40738-016-0027-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 11/04/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND Preimplantation genetic screening (PGS) is an important procedure for in vitro fertilization (IVF). A key step of PGS, blastomere removal, is abundant with many technical issues. The aim of this study was to compare a more simple procedure based on the Stipper Micropipetter, named S-biopsy, to the conventional aspiration method. METHODS On Day 3, 368 high-quality embryos (>7 cells on Day3 with <10% fragmentation) were collected from 38 women. For each patient, their embryos were equally separated between the conventional method (n = 188) and S-biopsy method (n = 180). The conventional method was performed using a standardized protocol. For the S-biopsy method, a laser was used to remove a significantly smaller portion of the zona pellucida. Afterwards, the complete embryo was aspirated with a Stripper Micropipetter, forcing the removal of the blastomere. Selected blastomeres went to PGS using CGH microarrays. Embryo integrity and blastocyst formation were assessed on Day 5. Differences between groups were assessed by either the Mann-Whitney test or Fisher Exact test. RESULTS Both methods resulted in the removal of only one blastomere. The S-biopsy and the conventional method did not differ in terms of affecting embryo integrity (95.0% vs. 95.7%) or blastocyst formation (72.7% vs. 70.7%). PGS analysis indicated that aneuploidy rate were similar between the two methods (63.1% vs. 65.2%). However, the time required to perform the S-biopsy method (179.2 ± 17.5 s) was significantly shorter (5-fold) than the conventional method. CONCLUSION The S-biopsy method is comparable to the conventional method that is used to remove a blastomere for PGS, but requires less time. Furthermore, due to the simplicity of the S-biopsy technique, this method is more ideal for IVF laboratories.
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Affiliation(s)
- Luciano Cedillo
- Laboratorio de Fertilización In Vitro and Laboratorio de Investigación y Diagnóstico Molecular, Instituto de Infertilidad y Genética, Ingenes México, Carretera México-Toluca No. 5420, Piso 6, Ofna 602 Col. El Yaqui, Del. Cuajimalpa, 05320 Mexico City, Mexico
| | - Azucena Ocampo-Bárcenas
- Laboratorio de Fertilización In Vitro and Laboratorio de Investigación y Diagnóstico Molecular, Instituto de Infertilidad y Genética, Ingenes México, Carretera México-Toluca No. 5420, Piso 6, Ofna 602 Col. El Yaqui, Del. Cuajimalpa, 05320 Mexico City, Mexico
| | - Israel Maldonado
- Laboratorio de Fertilización In Vitro and Laboratorio de Investigación y Diagnóstico Molecular, Instituto de Infertilidad y Genética, Ingenes México, Carretera México-Toluca No. 5420, Piso 6, Ofna 602 Col. El Yaqui, Del. Cuajimalpa, 05320 Mexico City, Mexico
| | - Francisco J. Valdez-Morales
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, 04510 Mexico
| | - Felipe Camargo
- Laboratorio de Fertilización In Vitro and Laboratorio de Investigación y Diagnóstico Molecular, Instituto de Infertilidad y Genética, Ingenes México, Carretera México-Toluca No. 5420, Piso 6, Ofna 602 Col. El Yaqui, Del. Cuajimalpa, 05320 Mexico City, Mexico
| | - Esther López-Bayghen
- Laboratorio de Fertilización In Vitro and Laboratorio de Investigación y Diagnóstico Molecular, Instituto de Infertilidad y Genética, Ingenes México, Carretera México-Toluca No. 5420, Piso 6, Ofna 602 Col. El Yaqui, Del. Cuajimalpa, 05320 Mexico City, Mexico
- Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Departamento de Toxicología, Av. IPN 2508 San Pedro Zac., 07380 Mexico City, Mexico
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Rodriguez-Purata J, Gingold J, Lee J, Whitehouse M, Slifkin R, Briton-Jones C, Copperman A, Sandler B. Hatching status before embryo transfer is not correlated with implantation rate in chromosomally screened blastocysts. Hum Reprod 2016; 31:2458-2470. [PMID: 27619770 DOI: 10.1093/humrep/dew205] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 07/03/2016] [Accepted: 07/21/2016] [Indexed: 11/12/2022] Open
Abstract
STUDY QUESTION Do the reproductive outcomes from the transfer of fully hatched (FH) blastocysts differ from those of not fully hatched (NFH) blastocysts? SUMMARY ANSWER Biochemical pregnancy rate (BPR), implantation rate (IR), live birth rate (LBR) and early pregnancy loss (EPL) rate are similar in FH and NFH single euploid blastocyst embryo transfers. WHAT IS KNOWN ALREADY The use of extended culture and PGS often leads to transfer of an embryo that is well developed and frequently FH from the zona pellucida. Without the protection of the zona, an FH embryo could be vulnerable to trauma during the transfer procedure. To date, no other study has evaluated the reproductive competence of an FH blastocyst transfer. STUDY DESIGN, SIZE, DURATION The retrospective study included 808 patients who underwent 808 cycles performed between September 2013 and July 2015 at a private academic IVF center. Of these, 436 cycles entailed transfer of a NFH blastocyst (n = 123 fresh transfer, n = 313 frozen/thawed embryo transfer (FET)) and 372 cycles entailed transfer of an FH blastocyst (n = 132 fresh, 240 FET). Fresh and FET cycles and associated clinical outcomes were considered separately. LBR was defined as the delivery of a live infant after 24 weeks of gestation. PARTICIPANTS/MATERIALS, SETTING, METHOD Trophectoderm biopsies were performed on Day 5 (d5) or 6 (d6) for embryos meeting morphology eligibility criteria (set at ≥3BC). Morphologic grading was determined using a modified Gardner-Schoolcraft scale prior to transfer. A single euploid embryo was selected for transfer per cycle on either the morning of d6, for fresh transfers or 5 days after progesterone supplementation for patients with transfer in an FET cycle. Embryos were classified as NFH (expansion Grade 3, 4 or 5) or FH (expansion Grade 6) cohorts. The main outcome measure was IR. MAIN RESULTS AND THE ROLE OF CHANCE In the fresh transfer group, IR was similar between NFH and FH cycles (53.7% versus 55.3%, P = 0.99, odds ratio (OR) 0.9; 95% confidence interval (CI) 0.6-1.5). Secondary outcomes were also statistically similar between groups: BPR (65.9% versus 66.7%, OR 1.0; 95% CI: 0.6-1.6), LBR (43.1% versus 47.7%, P = 0.45, OR 1.2; 95% CI: 0.7-1.9) and EPL rate (22.8% versus 18.2%, OR 1.3; 95% CI: 0.7-2.4). After adjusting for age, BMI, endometrial thickness at the LH surge and oocytes retrieved in a logistic regression (LR) model, the hatching status remained not associated with IR (P > 0.05). In the FET cycles, IR was similar between NFH and FH cycles (62.6% versus 61.7%, OR 1.0; 95% CI: 0.7-1.5). Secondary outcomes were similar between groups: BPR (74.1% versus 72.9%, respectively, OR 1.1; 95% CI: 0.7-1.6), LBR (55.0% versus 50.0%, OR 0.8; 95% CI: 0.6-1.1) and EPL rate (18.9% versus 22.9%, respectively, OR 0.8; 95% CI: 0.5-1.2). After adjusting for age, BMI, endometrial thickness at the LH surge and oocytes retrieved in an LR model, the hatching status was not shown to be associated with implantation (P > 0.05). LIMITATIONS, REASONS FOR CAUTION Limitations include the retrospective design and data from a single institution. Additionally, the study was limited to patients that developed high-quality blastocysts suitable for biopsy. WIDER IMPLICATIONS OF THE FINDINGS The results suggest that FH embryos are not more fragile or less likely to implant when compared to NFH counterparts. We found no evidence of altered IR or other clinical outcomes in the transfer of FH euploid embryos. STUDY FUNDING/COMPETING INTERESTS JG is funded by MSTP grant T32 GM007280 (NIH). No additional funding was received. There are no conflicts of interest to declare..
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Affiliation(s)
- Jorge Rodriguez-Purata
- Reproductive Medicine Associates of New York, 635 Madison Ave 10th Floor, New York, NY 10022, USA
| | - Julian Gingold
- Reproductive Medicine Associates of New York, 635 Madison Ave 10th Floor, New York, NY 10022, USA
| | - Joseph Lee
- Reproductive Medicine Associates of New York, 635 Madison Ave 10th Floor, New York, NY 10022, USA
| | - Michael Whitehouse
- Reproductive Medicine Associates of New York, 635 Madison Ave 10th Floor, New York, NY 10022, USA
| | - Richard Slifkin
- Reproductive Medicine Associates of New York, 635 Madison Ave 10th Floor, New York, NY 10022, USA
| | - Christine Briton-Jones
- Reproductive Medicine Associates of New York, 635 Madison Ave 10th Floor, New York, NY 10022, USA
| | - Alan Copperman
- Reproductive Medicine Associates of New York, 635 Madison Ave 10th Floor, New York, NY 10022, USA.,Obstetrics, Gynecology and Re productive Science, Icahn School of Medicine at Mount Sinai, Klingenstein Pavilion, 1176 Fifth Avenue, 9th Floor, New York, NY 10029, USA
| | - Benjamin Sandler
- Reproductive Medicine Associates of New York, 635 Madison Ave 10th Floor, New York, NY 10022, USA.,Obstetrics, Gynecology and Re productive Science, Icahn School of Medicine at Mount Sinai, Klingenstein Pavilion, 1176 Fifth Avenue, 9th Floor, New York, NY 10029, USA
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8
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Cimadomo D, Capalbo A, Ubaldi FM, Scarica C, Palagiano A, Canipari R, Rienzi L. The Impact of Biopsy on Human Embryo Developmental Potential during Preimplantation Genetic Diagnosis. BIOMED RESEARCH INTERNATIONAL 2016; 2016:7193075. [PMID: 26942198 PMCID: PMC4749789 DOI: 10.1155/2016/7193075] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 12/15/2015] [Accepted: 01/05/2016] [Indexed: 01/23/2023]
Abstract
Preimplantation Genetic Diagnosis and Screening (PGD/PGS) for monogenic diseases and/or numerical/structural chromosomal abnormalities is a tool for embryo testing aimed at identifying nonaffected and/or euploid embryos in a cohort produced during an IVF cycle. A critical aspect of this technology is the potential detrimental effect that the biopsy itself can have upon the embryo. Different embryo biopsy strategies have been proposed. Cleavage stage blastomere biopsy still represents the most commonly used method in Europe nowadays, although this approach has been shown to have a negative impact on embryo viability and implantation potential. Polar body biopsy has been proposed as an alternative to embryo biopsy especially for aneuploidy testing. However, to date no sufficiently powered study has clarified the impact of this procedure on embryo reproductive competence. Blastocyst stage biopsy represents nowadays the safest approach not to impact embryo implantation potential. For this reason, as well as for the evidences of a higher consistency of the molecular analysis when performed on trophectoderm cells, blastocyst biopsy implementation is gradually increasing worldwide. The aim of this review is to present the evidences published to date on the impact of the biopsy at different stages of preimplantation development upon human embryos reproductive potential.
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Affiliation(s)
- Danilo Cimadomo
- GENERA Centre for Reproductive Medicine, Clinica Valle Giulia, Via G. de Notaris 2/b, 00197 Rome, Italy
- Dipartimento di Scienze Anatomiche, University of Rome “La Sapienza”, Istologiche, Medico Legali e dell'Apparato Locomotore, Sezione Istologia ed Embriologia Medica, Via Antonio Scarpa 16, 00161 Rome, Italy
| | - Antonio Capalbo
- GENERA Centre for Reproductive Medicine, Clinica Valle Giulia, Via G. de Notaris 2/b, 00197 Rome, Italy
- GENETYX, Molecular Biology Laboratory, Via Fermi 1, 36063 Marostica, Italy
| | - Filippo Maria Ubaldi
- GENERA Centre for Reproductive Medicine, Clinica Valle Giulia, Via G. de Notaris 2/b, 00197 Rome, Italy
- GENETYX, Molecular Biology Laboratory, Via Fermi 1, 36063 Marostica, Italy
| | - Catello Scarica
- GENERA Centre for Reproductive Medicine, Clinica Valle Giulia, Via G. de Notaris 2/b, 00197 Rome, Italy
- Dipartimento di Scienze Anatomiche, University of Rome “La Sapienza”, Istologiche, Medico Legali e dell'Apparato Locomotore, Sezione Istologia ed Embriologia Medica, Via Antonio Scarpa 16, 00161 Rome, Italy
| | - Antonio Palagiano
- Seconda Università di Napoli, Via Antonio Vivaldi 43, 81100 Caserta, Italy
| | - Rita Canipari
- Dipartimento di Scienze Anatomiche, University of Rome “La Sapienza”, Istologiche, Medico Legali e dell'Apparato Locomotore, Sezione Istologia ed Embriologia Medica, Via Antonio Scarpa 16, 00161 Rome, Italy
| | - Laura Rienzi
- GENERA Centre for Reproductive Medicine, Clinica Valle Giulia, Via G. de Notaris 2/b, 00197 Rome, Italy
- GENETYX, Molecular Biology Laboratory, Via Fermi 1, 36063 Marostica, Italy
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Greco E, Fabozzi G, Ruberti A, Zavaglia D, Giulia Minasi M. Preimplantation genetic diagnosis and the biopsy technique: Important considerations. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/arsci.2013.12002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Kim HJ, Kim CH, Lee SM, Choe SA, Lee JY, Jee BC, Hwang D, Kim KC. Outcomes of preimplantation genetic diagnosis using either zona drilling with acidified Tyrode's solution or partial zona dissection. Clin Exp Reprod Med 2012; 39:118-24. [PMID: 23106043 PMCID: PMC3479235 DOI: 10.5653/cerm.2012.39.3.118] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 08/21/2012] [Accepted: 09/14/2012] [Indexed: 12/12/2022] Open
Abstract
Objective To review the outcomes of preimplantation genetic diagnosis (PGD) using zona drilling with acid Tyrode's solution (chemical zona pellucida drilling, chemical ZD) and those of partial zona dissection (PZD). Methods Clinical outcomes of seventy-one couples undergoing 85 PGD cycles from January 2005 to December 2010 were included. Blastocyst formation and the hatching rate, clinical pregnancy rate, ongoing pregnancy rate, implantation rate, and fetal gender ratio of the PZD and chemical ZD groups were compared. Results Application of PZD resulted in a significantly higher rate of clinical pregnancy (40.7% vs. 15.4%, p=0.022), ongoing pregnancy (35.6% vs. 11.5%, p=0.023), and implantation (18.1% vs. 5.7%, p=0.007) compared with chemical ZD. Among non-transferred embryos, the rate of blastocyst formation on day 5 (49.1% vs. 39.5%, p=0.016) and hatching on day 6 (47.2% vs. 26.5%, p<0.001) were also significantly higher in the PZD group. Conclusion The mechanical zona dissection method showed better outcomes than chemical ZD in terms of the blastocyst development and pregnancy rate. In this study, the fact that chemical ZD was conducted in different period from mechanical method should be considered in interpreting the result.
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Affiliation(s)
- Hyun Jung Kim
- Institute of Fertility and Genetics, Hamchoon Women's Clinic, Seoul, Korea
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Ly KD, Agarwal A, Nagy ZP. Preimplantation genetic screening: does it help or hinder IVF treatment and what is the role of the embryo? J Assist Reprod Genet 2011; 28:833-49. [PMID: 21743973 DOI: 10.1007/s10815-011-9608-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2010] [Accepted: 06/28/2011] [Indexed: 12/31/2022] Open
Abstract
Despite an ongoing debate over its efficacy, preimplantation genetic screening (PGS) is increasingly being used to detect numerical chromosomal abnormalities in embryos to improve implantation rates after IVF. The main indications for the use of PGS in IVF treatments include advanced maternal age, repeated implantation failure, and recurrent pregnancy loss. The success of PGS is highly dependent on technical competence, embryo culture quality, and the presence of mosaicism in preimplantation embryos. Today, cleavage stage biopsy is the most commonly used method for screening preimplantation embryos for aneuploidy. However, blastocyst biopsy is rapidly becoming the more preferred method due to a decreased likelihood of mosaicism and an increase in the amount of DNA available for testing. Instead of using 9 to 12 chromosome FISH, a 24 chromosome detection by aCGH or SNP microarray will be used. Thus, it is advised that before attempting to perform PGS and expecting any benefit, extended embryo culture towards day 5/6 should be established and proven and the clinical staff should demonstrate competence with routine competency assessments. A properly designed randomized control trial is needed to test the potential benefits of these new developments.
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Affiliation(s)
- Kim Dao Ly
- Center for Reproductive Medicine, Cleveland Clinic, Cleveland, Ohio, USA.
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12
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Martins WP, Rocha IA, Ferriani RA, Nastri CO. Assisted hatching of human embryos: a systematic review and meta-analysis of randomized controlled trials. Hum Reprod Update 2011; 17:438-453. [DOI: 10.1093/humupd/dmr012] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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Geber S, Bossi R, Lisboa CB, Valle M, Sampaio M. Laser confers less embryo exposure than acid tyrode for embryo biopsy in preimplantation genetic diagnosis cycles: a randomized study. Reprod Biol Endocrinol 2011; 9:58. [PMID: 21527004 PMCID: PMC3096917 DOI: 10.1186/1477-7827-9-58] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Accepted: 04/28/2011] [Indexed: 11/19/2022] Open
Abstract
We compared two methods of zona pellucida drilling. 213 embryos were biopsied with acid Tyrode. Each biopsy took 3 minutes and the entire procedure ~29 minutes. 5% of blastomeres lysed, 49% of embryos became blastocyst and 36% of patients became pregnant. 229 embryos were biopsied with laser. Each biopsy took 30 seconds and the entire procedure ~7 minutes. 2.5% of blastomeres lysed, 50.6% of embryos became blastocyst and 47% of patients became pregnant. We can conclude that laser can be used for embryo biopsy. Reduction of embryo exposure and of removed blastomeres is associated with increased blastocysts available for transfer and a better clinical outcome.
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Affiliation(s)
- Selmo Geber
- ORIGEN, Centro de Medicina Reprodutiva, Av. Contorno 7747, Lourdes, CEP 30110-120, Belo Horizonte, Minas Gerais, Brazil
| | - Renata Bossi
- ORIGEN, Centro de Medicina Reprodutiva, Av. Contorno 7747, Lourdes, CEP 30110-120, Belo Horizonte, Minas Gerais, Brazil
| | - Cintia B Lisboa
- ORIGEN, Centro de Medicina Reprodutiva, Av. Contorno 7747, Lourdes, CEP 30110-120, Belo Horizonte, Minas Gerais, Brazil
| | - Marcelo Valle
- ORIGEN, Centro de Medicina Reprodutiva, Av. Contorno 7747, Lourdes, CEP 30110-120, Belo Horizonte, Minas Gerais, Brazil
| | - Marcos Sampaio
- ORIGEN, Centro de Medicina Reprodutiva, Av. Contorno 7747, Lourdes, CEP 30110-120, Belo Horizonte, Minas Gerais, Brazil
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14
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The effects of different laser pulse lengths on the embryo biopsy procedure and embryo development to the blastocyst stage. J Assist Reprod Genet 2010; 27:663-7. [PMID: 20686919 DOI: 10.1007/s10815-010-9461-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Accepted: 07/21/2010] [Indexed: 10/19/2022] Open
Abstract
PURPOSE a laser is commonly used to remove a blastomere from an embryo for genetic testing. The laser uses intense heat which could possibly disrupt embryo development. It is the goal of this study to test the effects of different laser pulse lengths (and consequently heat) on the embryo biopsy procedure and embryo development. METHODS each embryo biopsy was performed randomly utilizing laser pulse lengths of 0.604mS (group I), 0.708mS (group II), and 1.010mS (group III). RESULTS for groups I, II, and III, 83, 86, and 71 embryos were biopsied, respectively. There was no difference in day 5 embryo quality or lysed blastomeres between groups. Average number of blastomeres biopsied between group I (1.0 ± 0.0), II (1.0 ± 0.2), and III (1.1 ± 0.2) was significant (0.0001). CONCLUSION our data demonstrates that laser pulse length does not influence the embryo biopsy procedure or embryo development.
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15
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Wang WH, Kaskar K, Ren Y, Gill J, DeSplinter T, Haddad G, Singh M. Comparison of development and implantation of human embryos biopsied with two different methods: aspiration and displacement. Fertil Steril 2009; 92:536-40. [DOI: 10.1016/j.fertnstert.2008.05.089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2008] [Revised: 05/14/2008] [Accepted: 05/30/2008] [Indexed: 10/21/2022]
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16
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Evaluación de la técnica de eclosión asistida. Rev Int Androl 2008. [DOI: 10.1016/s1698-031x(08)72569-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Wang WH, Kaskar K, Gill J, DeSplinter T. A simplified technique for embryo biopsy for preimplantation genetic diagnosis. Fertil Steril 2007; 90:438-42. [PMID: 17880956 DOI: 10.1016/j.fertnstert.2007.06.093] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2007] [Revised: 06/17/2007] [Accepted: 06/17/2007] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To report a simplified embryo biopsy method for preimplantation genetic diagnosis (PGD). DESIGN Technique and method. SETTING A regional hospital in vitro fertilization (IVF) laboratory and private reproductive medicine clinic. PATIENT(S) Women undergoing IVF and PGD. INTERVENTION(S) Blastomeres were successfully isolated from day-3 embryos at various stages. MAIN OUTCOME MEASURE(S) Blastomere integrity after biopsy, time of biopsy procedure, and subsequent blastocyst developmental rate. RESULT(S) Twenty embryos derived from abnormally fertilized oocytes (one pronucleus or three pronuclei) were used for biopsy at four-cell to 10-cell stages (day 3) by a laser zona drilling and assisted hatching micropipette delivery of culture medium inside the zona to push one blastomere out. Biopsies of all embryos using this method were successful. In two cases for PGD, fourteen 6-9-cell and four 3-4-cell stage embryos were successfully biopsied by this method. Ten out of 14 embryos from the 6-9-cell stage developed to hatching or hatched blastocysts. When two hatched blastocysts were vitrified, warmed, and cultured, both reexpanded, showing normal morphologic features. CONCLUSION(S) This technique is easy to learn, less damaging to the embryos, and less time consuming. It can be used for all stages of embryos without damage to either embryos or isolated blastomeres. It is an alternative method for embryo biopsy in PGD.
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Affiliation(s)
- Wei-Hua Wang
- Houston Fertility Institute, Tomball Regional Hospital, Tomball, Texas 77375, USA.
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18
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Hiraoka K, Fuchiwaki M, Hiraoka K, Horiuchi T, Murakami T, Kinutani M, Kinutani K. Zona pellucida removal and vitrified blastocyst transfer outcome: a preliminary study. Reprod Biomed Online 2007; 15:68-75. [PMID: 17623540 DOI: 10.1016/s1472-6483(10)60694-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The objective of this study was to investigate whether a change in assisted hatching technique from partial opening to total removal of the zona pellucida improved the outcome of vitrified blastocyst transfer. This was a preliminary observational study conducted from November 2003 to April 2006. Partial opening using acid Tyrode's solution was performed in 45 cycles, while total removal using a laser and mechanical pipetting was performed in 57 cycles. The clinical pregnancy, implantation, and delivery rates were higher in the total removal group than in the partial opening group (67% versus 42%, P < 0.02; 55% versus 30%, P < 0.01; 56% versus 36%, P < 0.04, respectively). These results suggest that total removal of the zona pellucida is associated with higher pregnancy, implantation and delivery rates compared with partial opening for vitrified blastocyst transfer.
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Affiliation(s)
- Kenichiro Hiraoka
- Kinutani Women's Clinic, 2-1-4-3F, Ohtemachi, Hiroshima 730-0051, Japan.
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Lanzendorf SE, Ratts VS, Moley KH, Goldstein JS, Dahan MH, Odem RR. A randomized, prospective study comparing laser-assisted hatching and assisted hatching using acidified medium. Fertil Steril 2007; 87:1450-7. [PMID: 17207801 DOI: 10.1016/j.fertnstert.2006.11.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2006] [Revised: 09/07/2006] [Accepted: 11/10/2006] [Indexed: 10/23/2022]
Abstract
OBJECTIVE To compare the clinical outcomes of patients whose transferred embryos underwent either laser-assisted hatching or hatching with acidified medium. DESIGN Randomized, prospective, double-blinded study. SETTING University-based IVF center. PATIENT(S) Clinical outcomes following IVF were compared in 159 patient cycles who randomly had all transferred embryos undergo laser-assisted hatching (Laser; n = 57) or hatching with acidified medium (Acid; n = 54). Patients whose embryos had zonae thickness <13 mum were not hatched (Thin; n = 8) and patients with > or =4 embryos at the 7- to 8-cell stage or higher on Day 3 were transferred on Day 5 (Day 5; n = 40). MAIN OUTCOME MEASURE(S) Implantation rates, clinical pregnancy rates, ongoing pregnancy rates, multiple pregnancy rates. RESULT(S) No significant differences were noted in clinical, ongoing, or multiple pregnancy rates between the four groups. The implantation rate for Day 5 transfers was significantly greater than both the Laser and Acid treatment groups. CONCLUSION The use of a 1.48-micron infrared diode laser beam provides a safe and rapid method for performing assisted hatching and did not have a negative impact on patient care when compared to outcomes achieved using acidified medium.
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Affiliation(s)
- Susan E Lanzendorf
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri 63108, USA.
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