Research of letrozole in animal models have revealed that it causes congenital anomalies if applied through pregnancy, but there have been no reports of this drug in pregnant Women of all ages.eleven, 13 Because anti-androgens can cause congenital anomalies, they tend to be taken with oral contraceptives to circumvent pregnancy.14 https://jaidenehyoc.bloggip.com/33993986/the-how-to-diagnose-pcos-diaries