Slow controlled-rate freezing of human in vitro matured oocytes: effects on maturation rate and kinetics and parthenogenetic activation  

Oleh:

Versieren, Karen ; Heindryckx, Bjorn ; O’Leary, Thomas ; De Croo, Ilse

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Fertility and Sterility (keterangan: ada di ClinicalKey) vol. 96 no. 03 (Sep. 2011), page 624-628.
Topik: Slow controlled-rate freezing; human oocytes; in vitro maturation; artificial activation

Ketersediaan

Perpustakaan FK Nomor Panggil: F02.K.2011.01 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

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.

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