The pill is used mainly for contraception, but also to regulate the menstrual cycle and to treat menstrual irregularities, excessive menstruation and polycystic ovary syndrome. If a woman has symptoms of menstrual irregularities such as prolonged or shortened menstrual cycles, and there are no organic lesions in the uterus after ultrasound examination, she can take the pill to regulate her menstrual cycle, starting on the 5th day of her menstrual cycle. Since the course of the pill is 21 days and you will have your period 3-5 days after stopping the pill, you can artificially adjust your menstrual cycle to about 28 days. Da Vine-35 is also able to lower androgens, so it can also treat polycystic ovary syndrome.