Fetal Development Pictures | 4 Weeks

Fetal Development at 4 weeks:

What's happening this week:

This week, your egg implants in the uterine lining. Once it fixes itself to the wall of your uterus, the tiny organism will divide into two groups of cells: those that will become the embryo and those that will form the placenta.

Your pregnancy week by week: 4 Weeks Pregnant

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