How does hyperprolactinemia affect fertility?

How does hyperprolactinemia affect fertility?

• A. Increases LH production
• B. Has no effect
• C. Causes hypogonadotropic hypogonadism with irregular menses or amenorrhea; infertility improves with treatment using dopamine agonists.
• D. Improves ovulation

Answer: (C)

Hyperprolactinemia suppresses the hypothalamic release of GnRH, which lowers the pituitary production of LH and FSH. With reduced gonadotropins, ovarian follicle development and ovulation falter, leading to irregular cycles or amenorrhea and infertility. Lowering prolactin with dopamine agonists removes this brake, allowing GnRH pulsatility to return, restoring normal LH/FSH secretion, regular ovulation, and improved fertility. This is why infertility is linked to irregular or absent menses in this context and why fertility often improves when prolactin levels are treated. It does not increase LH, has no effect, or directly improve ovulation without addressing the prolactin excess.

Hyperprolactinemia suppresses the hypothalamic release of GnRH, which lowers the pituitary production of LH and FSH. With reduced gonadotropins, ovarian follicle development and ovulation falter, leading to irregular cycles or amenorrhea and infertility. Lowering prolactin with dopamine agonists removes this brake, allowing GnRH pulsatility to return, restoring normal LH/FSH secretion, regular ovulation, and improved fertility. This is why infertility is linked to irregular or absent menses in this context and why fertility often improves when prolactin levels are treated. It does not increase LH, has no effect, or directly improve ovulation without addressing the prolactin excess.