Do birth control pills stop excessive hair growth by decreasing pituitary hormone stimulation?

Birth control pills can influence hair growth, particularly in cases of hormonal imbalances that contribute to conditions like polycystic ovary syndrome (PCOS). They primarily work by regulating hormone levels, including estrogen and progestin, which can help balance the higher levels of androgens (male hormones) that may cause excessive hair growth. By reducing the effects of these androgens, birth control pills can indirectly reduce excessive hair growth for some individuals.

However, the assertion that they stop excessive hair growth specifically by decreasing pituitary hormone stimulation is not accurate. Birth control pills primarily act at the ovarian level to modulate hormone production rather than directly targeting the pituitary gland's stimulation of other hormones. Thus, while birth control pills may be effective for some individuals in managing hair growth issues related to hormonal fluctuations, they do not universally guarantee a stop to excessive hair growth, nor do they specifically decrease pituitary stimulation as implied. This understanding supports the idea that the statement is false.