通过单一静态观测不显示前核的胚胎是由非典型的前核动力学或罕见的未受精卵细胞引起的,具有流产性裂解行为
Giovanni Coticchio1, Marilena Taggi2, Francesca Asturi3
1IVIRMA Global Research Alliance, IVIRMA Italia, Rome, Italy.
Human reproduction (Oxford, England)
|October 26, 2025
概括
时间间隔技术显示,即使在标准评估时间之外发生前核形成,也会使一些囊胞成长为囊胞阶段. 然而,没有前核形成的裂变会导致发育停止.
科学领域:
- 胚胎学 胚胎学
- 生殖医学 生殖医学
- 在体外受精 (IVF)
背景情况:
- 不典型的前核性胚胎 (0PN,1PN,3PN) 越来越多地被认为可以最大限度地提高胚胎产量和临床结果.
- 这种做法引发了临床和伦理方面的担忧,以及关于在没有典型的前核形成的情况下发展潜力的科学问题.
- 时隔技术 (TLT) 提供了详细的胚胎形态动力学,对于解决这些问题至关重要.
研究的目的:
- 通过静态评估观察到的非原核 (0PN) 受精模式是否支持胚胎发育能力.
- 调查异型前核外观和色时间的阴茎的发育潜力.
- 评估TLT在了解受精和早期胚胎发育中的作用.
主要方法:
- 对6035个由ICSI授精并使用TLT培养的卵子进行了回顾性观察研究 (2013-2020年).
- 异构体被按亲核 (PN) 类型和PN出现 (tPNa) 和消失 (tPNf) 的时间分类.
- 监测到囊胚阶段的发育;0PN胚胎显示裂变,分析发育停止事件.
主要成果:
- 静态观测在16-18小时的种植后 (hpi) 错过了显著的PN形成/色事件.
- 18-20hpi之间的前核衰减与最大的胚胎细胞形成率 (65.4%) 和euploidy率有关.
- 真正的0PN卵细胞 (24.6%) 在紧缩之前被捕,显示异常的分裂模式.
结论:
- TLT强调了静态受精评估的局限性,影响了胚胎选择和利用.
- 非典型的前核定时可以与胚胎细胞的发育相容,但真正的0PN裂变在早期停止.
- TLT澄清了,在没有前核形成的情况下,胚胎细胞的发育不会发生.
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