Five months, three emergency contraceptives, still working?

Emergency contraceptives cannot be used as a routine method of contraception. They are mainly used for post-unprotected sex remedies. Currently, there are no strict requirements on the frequency of taking contraceptives. The overall contraceptive effect of emergency contraceptives is only 80%. The contraceptive effect is achieved by inhibiting ovulation. If the woman is already ovulating, taking the medicine is ineffective.