胚胎学：研究胚胎和胎儿的形成和发育的学科。

Study of the formation and development of an embryo and fetus.

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胚胎学：研究胚胎和胎儿的形成和发育的学科。

To cause the expulsion of(an embryo or fetus)before it is viable.

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胚胎学：研究胚胎和胎儿的形成和发育的学科。

To cause the expulsion of(an embryo or fetus)before it is viable.

youdao