孕晚期人未成熟卵母细胞的体外成熟:一种新的卵母细胞来源

目的 探讨来源于孕晚期、自然周期及Gn刺激周期(包括超促排周期及IVM周期)的人未成熟卵母细胞体外成熟的差异及颗粒细胞对孕晚期卵母细胞体外成熟的影响.方法 共获得未成熟卵母细胞1076枚,包括OCC 633枚和DO 453枚.其中OCC分为孕晚期组、自然周期组和IVM周期组;DO分为孕晚期组、自然周期组和超促排卵周期组;孕晚期来源的未成熟卵母细胞分为OCC组和DO组.所有未成熟卵母细胞体外成熟后,ICSI受精序贯培养,除IVM周期组行胚胎移植外,其余均培养至囊胚阶段.分别比较OCC和DO各组未成熟卵母细胞的成熟率、受精率、卵裂率和孕晚期组、自然周期组和超促排卵周期组的囊胚形成率,统计IVM周期组的移植周期妊娠率;比较孕晚期OCC组与DO组的成熟率、受精率、卵裂率和囊胚形成率.结果 OCC:孕晚期组、自然周期组及IVM周期组的体外成熟率分别为74.3%、76.9%和82.2%,孕晚期组与IVM周期组相比具有统计学差异;三组受精率、卵裂率相比,孕晚期组和自然周期组囊胚形成率相比均未见统计学差异,IVM周期组移植周期妊娠率为20%.DO:超促排卵周期组体外成熟率最高(86.0%),明显高于自然周期组(72.5%)和孕晚期组(72.7%),P<0.01;孕晚期组受精率、卵裂率、囊胚形成率分别为65.0%、83.3%和38.5%,与其他两组相比均亦未见统计学差异.孕晚期OCC组与DO组的成熟率、受精率、卵裂率和囊胚形成率无差别.结论 孕晚期来源的未成熟卵母细胞在体外具有同样的发育潜能,孕晚期捐献的卵母细胞可作为一种供卵来源:有无颗粒细胞并不影响孕晚期卵母细胞的发育能力.

Abstract：

Objective To investigate the in vitro maturation of human oocytes (IVM)from pregnant late term,natural cycles and Gn stimulating cycles and the effect of granulose cells on IVM from pregnant late term.Methods A total of 1086 immature oocytes were obtained including 633 oocyte-cumulus complexes(OCCs)and 453 denuded oocytes(DOs).OCCs were divided into pregnant late term group,natural cycle group and IVM group,and DOs were divided into pregnant late term group,natural cycle group and controlled ovarian hyperstimulation(COH) group.All the oocytes were matured in IVM culture system and fertilized by ICSI.The embyos were cultured to blastcyst stage except that those in IVM group were transferred into the utems.The main outcomes were assessed including maturation rate(MR), fertilization rate(FR),cleaverage rate(CR),and blastulation rate(BR)(natural cycle group,pregnant late term group and COH group)and pregnancy rate per transfer cycle(PR) of IVM group.ReslIIts MR of OCCs in pregnant late term group,natural cycle group and COH group was 74.3%,76.9%and 82.2%,respectively,showing statistical difference between pregnant late term cycle group and IVM group.No statistical difference was observed in FR,CR or BR between the three groups.For IVM cycle group,clinical pregnancy rate of 20%per aspiration was achieved.For DOs,MR of COH group(86.0%)was significantly higher than that of the natural cycle group(72.5%)and pregnant late term group(72.7%) (P<0.01).FR,CR and BR showed no statistical difference among the 3 groups.No difference was found in MR,FR,CR and BR between OCCs group and DOs group from pregnant late term.Conclusions The oocytes from pregnant late term have the same development potential as those from natural cycles or Gn stimulating cycles in vitro,and provide a new source of donor oocytes.Granulose ceils do not affect the IVM from pregnant late term.

In vitro maturation of human oocytes from pregnant late term:a new source of oocytes

Objective To investigate the in vitro maturation of human oocytes(IVM) from pregnant late term,natural cycles and Gn stimulating cycles and the effect of granulose cells on IVM from pregnant late term.Methods A total of 1086 immature oocytes were obtained including 633 oocyte-cumulus complexes(OCCs) and 453 denuded oocytes(DOs).OCCs were divided into pregnant late term group,natural cycle group and IVM group,and DOs were divided into pregnant late term group,natural cycle group and controlled ovarian hypers...