Skip Navigation
The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
Donate Now Get Free Videos

Movie Theater

The Embryonic Period


8 weeks

From The Biology of Prenatal Development.Buy Now

Script: 在受精后的头8周, 发育中的人称为胚胎, 意思是"在里面成长"。 这段时间称为胚胎期, 其特点是形成 大部分主要身体系统。

All ages referenced to fertilization, not last menstrual period.
See Snapshots   |   Log in to create a playlist
Reflexive Movement
Reflexive Movement
Epidermis and Hair
Epidermis and Hair
The Embryonic Period
The Embryonic Period
End of Embryonic Period
End of Embryonic Period
Kidneys Produce Urine
Kidneys Produce Urine
Eyelid Fusion
Eyelid Fusion
When does health begin? Find out now.
Tell your story. Create your own pregnancy calendar.