<prompt> A female has previous child with congenital adrenal hyperplasia. In the present pregnancy, steroid therapy should be staed -After karyotyping and determination of sex of the babyAt the time of deliveryBefore conceptionAs soon as pregnancy is diagnosed  <response>: Ans. is d i.e., As soon as pregnancy is diagnosed o Recommendations for pregnancies ar risk of CAH consists of administration of dexamethasone 20 mgkg. It staed by 6 weeks of gestation, this ameliorates the virilization of the external genitilia in affected females chrionic villus sampling is then performed to determine the sex and genotype of the fetus; therapy is continued only if the fetus is an affected female. o As pregnancy is diagnosed by urine test at around 6-8 weeks, so it should be the answer. 