Question Detail

BIO 101 CONGENITAL ANOMALIES AND TERATOGENESIS Objective Question

Question

During which prenatal period is the developing embryo most vulnerable to teratogens?
Options
A First 2 weeks
B 3rd to 8th weeks (embryonic phase)
Correct Answer
C 9th to 12th weeks
D Second and third trimesters
Correct Answer

Option B is the correct answer.

Detailed Explanation

The developing embryo is most vulnerable to teratogens during the embryonic phase (3rd to 8th weeks of pregnancy) when the organs are being formed.

Hint

This is the period of major organogenesis.

Question Info