胚前期的 pre-embryonic
着床前胚胎的内细胞团 inner cell mass ; ICM
植入前胚胎的内细胞团 inner cell mass ; ICM
前囊胚的内细胞团 inner cell mass
前胚胎的内细胞团 inner cell mass
胚胎植入前的遗传诊断 PGD
那些携带灭活基因的胚胚胎干细胞经分离出来后注入称作胚泡的胚前组织中。
Those ES cells carrying the inactivated gene can then be isolated and introduced (by injection) into a pre-embryonic structure called the blastocyst.
非常有趣的是，发育中的哺乳动物晶胚的心脏在分化为四腔室前，与斑马鱼的双腔心脏非常相似。
Intriguingly, before the heart of a developing mammalian embryo separates into four Chambers, it looks similar to the two-chambered zebrafish heart.
研究者们在神经板形成前，从“阶段3”的鸡胚种移植了一些细胞，种植在非诱导性培养物中。
The researchers grew grafts of cells from "stage 3" chick embryos, before the neural plate formed, in non-inducing cultures.
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