<prompt> Which of the following is the least common cause of ambiguous genitalia in a female child-Fetal placental steroid sulfatase deficiencyFetal placental aromatase deficiencyCongenital adrenal hyperplasiaWNT-4 gene mutation  <response>: Ans is a i.e., Fetal placental steroid sulfatase deficiency o Placental steroid sufatase deficiency is an X-linked disorder affects only males that does not lead to ambiguous genitalia in a female child. o Placental steroid sullatase deficiency is a rare X-linked disorder and all affected fetuses are males Williams 22d8I o Congenital adrenal hyperplasia is the most common cause of ambiguous genitalia in female child. o Fetal placental aromatase deficiency and WNT-4 gene mutation cause ambiguous genitalia in female child. 