A female has the previous child with congenital adrenal hyperplasia. In the present pregnancy, steroid therapy should be started –
After karyotyping and determination of sex of the baby
At the time of delivery
Before conception
As soon as pregnancy is diagnosed
Recommendations for pregnancies.ar risk of CAH consists of administration of dexamethasone (20 mg/kg). It started by 6 weeks of gestation, this ameliorates the virilization of the external genitalia in affected females chronic 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.
As pregnancy is diagnosed (by urine test) at around 6-8 weeks, so it should be the answer.