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What are the major features of embryonic...

What are the major features of embryonic development at the By the end of 12 weeks (first trimester) of pregnancy?

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**Step-by-Step Solution:** 1. **Understanding the Timeline of Pregnancy:** - Pregnancy is typically divided into three trimesters, each lasting about three months or 12 weeks. By the end of the first trimester, significant developments occur in the embryo. 2. **Heartbeat Detection:** - By the end of the first month (approximately 4 weeks), the heartbeat of the embryo can be detected. This is an important milestone as it indicates the establishment of circulation and the functioning of the heart. ...
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