Is it safe to have your period?

In theory, in the past week of menstruation and a week before the expected menstrual cramps, called the safe period. For menstrual regularity, cycle stability, ovulation period is generally about two weeks before the expected menstrual cramps, each month there is a batch of follicle development, of which only one dominant follicle ovulates, so theoretically only one egg per month, then in the ovulation period before and after a week, called the dangerous period, the other time is called the safe period. In this way, a week before menstruation is expected and a week after menstruation is clean, ovulation should not be shown again, so it is called safe period. But for irregular menstruation, abnormal ovulation may be shown, and ovulation cannot be calculated according to menstruation. In addition, due to occasional emotions, work, weight loss, etc., abnormal ovulation may also be shown. Therefore, contraception during safe period is actually unsafe and generally not advocated. It is recommended that condoms, IUDs or short-acting contraceptives are the most appropriate contraceptive methods.