Explain in detail three trimesters of pregnancy ?
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Explanation:
A pregnancy is divided into trimesters:
the first trimester is from week 1 to the end of week 12.
the second trimester is from week 13 to the end of week 26.
the third trimester is from week 27 to the end of the pregnancy.
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Conception to about the 12th week of pregnancy marks the first trimester. The second trimester is weeks 13 to 27, and the third trimester starts about 28 weeks and lasts until birth.
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