Risk of congenital defects in a baby is maximum, if the gestational age at the time of maternal rubella infection is:: (A) < 11 weeks, (B) 11-12 weeks, (C) 13-14 weeks, (D) 15-16 weeks
Answer is A. a. < 11 weeks(Ref: Nelson's 20/e p 1548-1551)Risk of congenital defects in a baby is maximum, if mother acquires Rubella in the first trimester (before 11 weeks).