Yosmin is drospirenone ethinyl estradiol tablets, has been taking can play a role in delaying menstruation, usually within 1 week after taking the withdrawal of bleeding that is the onset of menstruation. As drospirenone ethinyl estradiol tablets are estrogen-progestin complex preparation, its main role in progesterone-like effect, so during the drug due to the role of progesterone will lead to the endometrium endocrine phase reaction, to be discontinued, the body progesterone levels decline will lead to endometrial stripping and menstrual vaginal bleeding, the drug will not be menstruation during the period of menstruation. Although drospirenone ethinyl estradiol tablets are commonly used clinically as contraceptives to play a contraceptive role; but it can also adjust the menstrual cycle, clinically used in polycystic ovary syndrome, endometriosis and other diseases. For patients who need to take drospirenone ethinyl estradiol tablets, it is recommended to go to the gynecology department of the regular hospital, under the guidance of the doctor to take medication, do not blindly use drugs.