Evaluation of pronuclear morphology as the only selection criterion for further embryo culture and transfer: results of a prospective multicentre study
作者:M. Montag、H. van der Ven
DOI:10.1093/humrep/16.11.2384
日期:2001.11
BACKGROUND: The aim was to study zygote evaluation based on pronuclear morphology under the German embryo protection law, according to which only a maximum of three zygotes are allowed to be cultured for embryo transfer. METHODS: In this prospective multicentre study, a total of 512 treatment cycles was performed at 10 centres, between November 1999 and October 2000. Zygotes were classified into seven patterns (0A, 0B and 1–5). Pattern 0A and 0B zygotes were preferentially used for further culture and transfer. RESULTS: Cycles with transfer of at least one embryo derived from pattern 0B, but not pattern 0A, resulted in significantly higher pregnancy (37.9%) and implantation rates (20.5%) compared with non-pattern 0B cycles (26.4 and 15.7%; P < 0.05 and P < 0.01 respectively). In younger patients (aged ≤35 years), significantly more 0B zygotes were available for transfer than in older patients (34.2 versus 25.8%; P < 0.005). CONCLUSIONS: From these data, it is concluded that evaluation of pronuclear morphology is beneficial, especially for countries with legal restrictions regarding embryo selection.
背景:目的是研究德国胚胎保护法下基于原核形态的受精卵评估,根据该法,最多允许培养三个受精卵进行胚胎移植。方法:在这项前瞻性多中心研究中,1999 年 11 月至 2000 年 10 月期间,在 10 个中心总共进行了 512 个治疗周期。受精卵被分为七种模式(0A、0B 和 1-5)。 0A和0B型合子优先用于进一步培养和转移。结果:与非模式 0B 周期(26.4 和 15.7%;P分别 < 0.05 和 P < 0.01)。在年轻患者(年龄≤35岁)中,可用于移植的0B受精卵明显多于老年患者(34.2% vs 25.8%;P < 0.005)。结论:从这些数据可以得出结论,原核形态的评估是有益的,特别是对于对胚胎选择有法律限制的国家。