Norethindrone belongs to the progesterone class of drugs, used for menstrual irregularities, uterine functional bleeding, endometriosis and so on.
Norethindrone has an inhibitory effect on the secretion of hypothalamic luteinizing hormone-releasing hormone (LHRH), and reduces the body's sensitivity to LHRH by stimulating the anterior pituitary gland, thereby achieving the purpose of blocking the release of gonadotropins and producing the effect of inhibiting ovulation. Norethindrone can increase the consistency of cervical mucus to prevent sperm from penetrating fertilization, while inhibiting the development and growth of endometrial glands, affecting pregnancy egg implantation.
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