When does ovulation happen while on medroxyprogesterone?

Ovulation does not typically occur while a person is taking medroxyprogesterone injections because this hormonal contraceptive prevents the ovaries from releasing eggs (ovulation). Medroxyprogesterone works by suppressing certain hormones, including luteinizing hormone and follicle-stimulating hormone, which play key roles in regulating the menstrual cycle, including the process of ovulation.