Pseudohermaphroditism in a female child is most commonly due to –: (A) 21–hydroxylase deficiency, (B) 17–hydroxylase deficiency, (C) 11–hydroxylase deficiency, (D) 3–hydroxylase deficiency
Answer is A. Classic 21-hydroxylase deficiency is the most common cause of Ambiguous genitalia in a newborn.
Virilization is usually apparent at birth in females i.e Pseudohermaphroditism of a female child.