20 St. 30 Min, 3 Mai 2002 Jahr - Weeks 4-6
Beschreibung:
Within the zygote, a few of the basic organs within the body begin to form. Some of these organs include the brain and heart. These are some of the first organs to develop within the fetal.
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20 St. 30 Min, 3 Mai 2002 Jahr
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~ 22 years ago