人類胚胎發育
人类胚胎发育[1]是指人类胚胎的形成和发育。当精子成功进入卵细胞并与卵细胞融合时，就会出現受精。然后便會形成受精卵，此後便意味著胚胎開始發育。當人類的人类胚胎发育至第九周时，此時的胚胎開始被称为胎兒。胚胎發育的前八周共要經歷23個階段。人類的妊娠期一共要9個月或者40周。
参考文献
- ^ germinal stage. Mosby's Medical Dictionary, 8th edition. Elsevier. [6 October 2013]. （原始内容存档于2019-05-15）.
| ||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.
Cover photo is available under {{::mainImage.info.license.name || 'Unknown'}} license.
Cover photo is available under {{::mainImage.info.license.name || 'Unknown'}} license.
Credit:
(see original file).
