Lynestrenol is used for contraception.
How Lynestrenol works Lynestrenol is a progestin, a type of female hormone. It functions by preventing sperm cells from entering the uterus, thickening the cervical mucus, and inhibiting the development of the female egg. This mechanism helps to prevent pregnancy.
Common side effects of Lynestrenol include headache, nausea, weight gain, irregular menstrual cycle, mood changes, acne, and breast pain.