After taking emergency contraceptive pills, from the perspective of eugenics, it is recommended to start preparing for pregnancy after three months. The main ingredient of emergency contraceptive pills is high potency progesterone, which achieves the effect of contraception by changing the level of hormones in the body, thus inhibiting ovulation and preventing the fertilized egg from implanting. However, emergency contraceptive pills can also have some adverse effects, such as some women taking emergency contraceptive pills, easy to appear in the body hormone level disorders, resulting in menstrual disorders, ovulation abnormalities, vaginal irregular bleeding and so on. Generally in three months after taking emergency contraceptive pills, the body’s hormone levels can be restored to normal, it is recommended to prepare for pregnancy at this time, you can begin to take folic acid under the guidance of a physician, remember not to blindly take drugs during the preparation period, so as to avoid the development of embryos have an impact.