Ursine is a contraceptive pill that is effective if used for contraception while taking the pill. However, when you stop taking the pill and your period starts, it is not effective if you do not take the pill, and you need to take other methods of contraception if you have sex. Since Eusyn contains estrogen and progestin, it is also used as a medicine to regulate menstruation. It is only effective if you take it for 3 months to regulate your menstruation, because in this case 3 months is 1 course of treatment. If the effect is better after 1 course of treatment, you can stop taking the drug. If the effect is not good after 1 course of treatment, you need to take the second course of the drug, but it is not effective to take 1 month at this time.