Maximum teratogenic effect on heart of fetus is between-

Ans. is 'c' i.e., 6-8 weeks Period of gestation and teratogenso Based on the gestation at exposure, a teratogen can either induce an embryopathy or a fetopathy.o From this perspective several critical periods of embryonic or fetal development are described:Preimplantation - fertilization to implantationEmbryonic - second through the ninth weekFetal - ninth week to termo Period of orsanosenesis (Embryonic -2-8 weeks of conception) is the time of maximum vulnerability, and each embryonic system has a period of maximum susceptibility.# Heart is typically affected if the teratogen acts between 6-8 weeks of gestation.# CNS maximum susceptibility between 17 - 30th post fertilization days.