Which medication mimics luteinizing hormone action to stimulate ovulation in infertility treatment?

The medication that mimics luteinizing hormone (LH) action to stimulate ovulation in infertility treatment is choriogonadotropin alfa. This drug is a recombinant form of human chorionic gonadotropin (hCG), which has a similar structure and function to LH. In the context of fertility treatments, choriogonadotropin alfa is used to trigger ovulation by stimulating the ovaries following the administration of follicle-stimulating hormone (FSH). It effectively induces the final maturation of ovarian follicles, leading to ovulation.

This mechanism is critical in assisted reproductive technologies and can help women achieve successful conception by ensuring that ovulation occurs at the right time during treatment protocols.

The other medications listed, while involved in reproductive health, serve different functions. Cetrorelix and ganirelix are GnRH antagonists used to prevent premature ovulation during controlled ovarian stimulation. Leuprolide is a GnRH agonist that can initially stimulate gonadotropin release but ultimately leads to suppression of gonadal function when given continuously. These medications do not directly stimulate ovulation like choriogonadotropin alfa does.