Slow controlled-rate freezing of human in vitro matured oocytes: effects on maturation rate and kinetics and parthenogenetic activation
| Autor: | Thomas O'Leary, Karen Versieren, Etienne Van den Abbeel, Petra De Sutter, Ilse De Croo, Björn Heindryckx, Jan Gerris |
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| Rok vydání: | 2011 |
| Předmět: |
Cell Survival
medicine.medical_treatment Parthenogenesis Fertilization in Vitro In Vitro Techniques Intracytoplasmic sperm injection Cryopreservation Andrology medicine Humans Vitrification Protein Kinase Inhibitors Incubation Germinal vesicle Oocyte Donation Chemistry Adenine Embryogenesis Obstetrics and Gynecology Electric Stimulation Stimulation Chemical In vitro maturation Reproductive Medicine Oocytes Female |
| Zdroj: | Fertility and Sterility. 96:624-628 |
| ISSN: | 0015-0282 |
| Popis: | Objective To create a pool of frozen donated human oocytes and find the optimal stage for slow controlled-rate freezing of human in vitro matured oocytes. Design Oocytes at different developmental stages of maturation (germinal vesicle, metaphase I, or metaphase II) and oocytes that failed to fertilize after IVF or intracytoplasmic sperm injection (ICSI) were frozen using a slow controlled-rate freezing protocol. Frozen/thawed oocytes were artificially activated to verify activation potential and compared with oocytes that were not frozen. Setting University hospital–based fertility center. Patient(s) Stimulated patients undergoing IVF/ICSI treatment donated oocytes left over during their infertility treatment. Intervention(s) Human oocytes were frozen at different stages of maturation. Fresh and frozen/thawed oocytes were activated by electrical pulses followed by incubation in 6-dimethylaminopurine. Main Outcome Measure(s) Survival rate, maturation rate and kinetics, and activation potential. Result(s) Human oocytes at all developmental stages have high survival rates after slow controlled-rate freezing. Frozen/thawed germinal vesicle oocytes showed decreased and delayed maturation after thawing. Activation potential was not affected. Conclusion(s) A pool of donated human oocytes could be established using slow controlled-rate freezing. Immature oocytes should be frozen after in vitro maturation. |
| Databáze: | OpenAIRE |
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