Teratogenicity results when drugs are given during____________?
Correct answer: A. First trimester
- A. First trimester
- B. Second trimester
- C. Third trimester
- D. Soon after birth
Explanation
The first trimester is the major period of organ formation, making the embryo especially vulnerable to structural teratogenic effects. Drug exposure later in pregnancy can still cause functional or growth-related harm, but first-trimester exposure is the classic answer.
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