An infant born to an alcoholic mother had microcephaly and cardiac abnormalities and died despite resuscitative efforts. During which of the following periods of pregnancy is alcohol most teratogenic?
(A)First 2 weeks
(B)Third through ninth weeks
(C)Ninth through twelfth weeks
(D)Twelfth through sixteenth weeks
(E)Sixteenth through twentieth weeks
Answer: (B)Third through ninth weeks