Deficiency of the glycoprotein WNT4, associated with loss of function mutation(s) in the WNT4 gene. The condition in 46,XX individuals is characterized by mild hyperandrogenism, absence of underdevelopment of the uterus, and sometimes absence of underdevelopment of the vagina. The disease is mullerian aplasia and hyperandrogenism (MONDO_0008019). Also known as: Mullerian duct failure and hyperandrogenism, Müllerian duct failure and hyperandrogenism, WNT4 Deficiency, WNT4 deficiency.