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All organs of the Fetus are formed during first three months of Pregnancy. So drugs taken during this period have high chances of 'Structural' damage to the Fetus. Afterward 'Functional' damage can occur.So your Doctor will be very careful about drugs given in First Trimester ofPregnancy.

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11y ago
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11y ago

Because it is still developing or going a process of organeosis, there is a risk of abortion.

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Q: Why do you think a fetus is most risk during the first trimester?
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