Dayin-35 generic name is ethinyl estradiol cyproterone tablets, children with long periods after menarche do not need to take ethinyl estradiol cyproterone tablets. Ethinyl estradiol cyproterone tablets is a short-acting contraceptive pill, commonly used clinically in the treatment of menstrual disorders or polycystic ovary syndrome, and in a few cases for contraception. After the child’s menarche, ovarian function is not sound, the phenomenon of long periods can be observed for a period of time, generally two years after the menarche, there is unstable menstruation, irregular phenomenon, manifested as prolonged menstrual period, cycle lengthening or shortening, menstrual flow increased and so on, there is no need to take ethinyl estradiol cyproterone tablets orally, generally with the gradual improvement of the function of the ovary, the menstruation will tend to normalize. After the first menstruation, long periods and other conditions should be timely consultation, under the guidance of a professional doctor to standardize the treatment, not blindly use their own drugs.