Question

during pregnancy, excess ______ intake is known to be teratogenic. vitamin a biotin vitamin k folate

Explanation:

Vitamin A is a fat - soluble vitamin. Excessive intake during pregnancy can cross the placenta and disrupt normal embryonic development. Biotin deficiency can cause health problems but excess is not teratogenic. Vitamin K is important for blood clotting and there is no significant evidence of teratogenicity with excess. Folate is recommended during pregnancy for neural tube development and excess is not teratogenic.

Answer:

vitamin A