The likelihood of pregnancy during the safe period is very, very small, with a general chance of pregnancy of less than 0.5%. The so-called safe period is usually within 3-5 days after the end of menstruation, which is for women with relatively regular menstrual cycles and menstrual periods lasting about 3-5 days. If the period is irregular and lasts too long, the so-called safe period will not be safe. The reason why it is safe and not easy to get pregnant is that during this period, your period has just ended, your estrogen level has just started to rise and your follicles are developing. It takes 7-10 days for the follicles to develop and mature, so there are no mature follicles discharged during this period and there is no possibility of pregnancy. However, for women with irregular periods, the possibility of safe ovulation cannot be ruled out, so you need to use safe contraception or other methods of contraception depending on your specific situation.