How do hormones in implants prevent the ovary releasing an egg?

Hormonal implants release synthetic hormones, typically progestin, which work primarily by inhibiting ovulation. They suppress the secretion of luteinizing hormone (LH) from the pituitary gland, which is essential for triggering the release of an egg from the ovary. Additionally, these hormones thicken cervical mucus, making it more difficult for sperm to reach any eggs that might be released. This combination effectively prevents pregnancy.