n.胚泡；囊胚

=blastula.

M+B：morula and blastocyst stages. 桑椹期和囊胚期。

The zygote, by cell division, grows into a morula an then into a blastocyst. 通過細胞分裂，受精卵發(fā)育成桑葚胚，然后發(fā)育成囊胚。

The blastocyst can then be transplanted into a female mouse to develop to term. 胚泡又被移植入母鼠體內(nèi)生長。

But the blastocyst from which it came can continue to develop into an embryo and then a foetus. 但它是從胚泡移走細胞能繼續(xù)發(fā)展成為一個胚胎,胎。

The researchers used fast neutrons to irradiate mouse embryos between the blastocyst stage and the beginning of somite formation. 研究人員用快中子照射在胚泡期和體節(jié)形成開始之間的小鼠胚胎。

囊胚