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The Endowment for Human Development
The Endowment for Human Development
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Weight Gain


3 months

From The Biology of Prenatal Development.Buy Now

Script: Between 11 and 12 weeks, fetal weight increases nearly 60%.

Twelve weeks marks the end of the first third, or trimester, of pregnancy.

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
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