<prompt> A pregnant mother presents with history of delivery of a previous child with Congenital Adrenal Hyperplasia CAH. The best management protocol for the current pregnancy is:To sta prednisolone after establishing whether fetus is affected by Chorionic Villous SamplingTo sta dexamethasone as soon as pregnancy is confirmedTo sta dexamethasone after determining sex of the fetus by KaryotypingTo sta prednisolone after determining sex of the fetus with USG  <response>: CAH is autosomal recessive; if a woman has previously had a child with CAH and again becomes pregnant the same paner, her fetus will have a one in four chances of having CAH. Because the period during which the genitalia of a female fetus may become virilized begins only 6 wk after conception, treatment must be instituted essentially as soon as the woman knows she is pregnant. Ref: Novaks Gynecology 14th edition, Page 1095 ; Medical care of pregnant patient American college of physicians 2nd edition, page 298, 299 