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

Right- and Left-Handedness


8 weeks

From The Biology of Prenatal Development.Buy Now

Script: 到8周,75%的胚胎 展示右手向先。 余下的胚胎中 左手向先和 没有偏爱者 各占一半。 这是右手或左手向先 举止的最早迹象。

All ages referenced to fertilization, not last menstrual period.
See Snapshots   |   Log in to create a playlist
Ovaries Identifiable
Ovaries Identifiable
The Highly Complex Brain
The Highly Complex Brain
Right- and Left-Handedness
Right- and Left-Handedness
Rolling Over
Rolling Over
Spontaneous Movement
Spontaneous Movement
Reflexive Movement
Reflexive Movement
When does health begin? Find out now.
Help give babies a healthy start and a healthy future. Donate now.


Add a Comment

Your Name: Log In 3rd-party login: Facebook     Google     Yahoo

Comment: