This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
A female has previous child with congenital adrenal hyperplasia. In the present pregnancy, steroid therapy should be staed - 
Select and explain. 
A. After karyotyping and determination of sex of the baby, B. At the time of delivery, C. Before conception, D. As soon as pregnancy is diagnosed
D: As soon as pregnancy is diagnosed
Answer: D: As soon as pregnancy is diagnosed 
Explanation: 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 mg/kg). 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.