JUST SCIENCE - Attention Students

The mileposts in human pregnancy are: First Trimester (weeks 0-12 or 0-3 months): After implantation of the embryo, vital organs form and the heart begins to beat. At the end of this trimester the embryo is now called a . fetus. Second Trimester (weeks 13-24 or 4-6 months): Fetus moves, kicks, and swallows. All internal organs are maturing. ................
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