The vulnerable period of pregnancy for the causation of foetal malformation is_____________?
Correct answer: B. 19 - 55 days
- A. 1 - 18 days
- B. 19 - 55 days
- C. 56 - 85 days
- D. II trimester
Explanation
The major teratogenic period is the embryonic organogenesis stage, approximately weeks 3 to 8, corresponding most closely to days 19 to 55. Exposures before this often follow an all-or-none effect rather than producing specific malformations.
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