shòujīngluǎn / zài / zǐgōng / nèi / zhuóchuáng / hòu / pēitāi / jiù / kāishǐ / fāyù

受精卵在子宫内着床后，胚胎就开始发育。

After the fertilized ovum implants in the uterus, the embryo begins to develop.