After taking levonorgestrel, women are advised to prepare for pregnancy after 3 months of stopping the pill. Levonorgestrel is an emergency contraceptive pill that should be taken in the oral state within 72 hours after the end of intercourse, which can prevent the fertilized egg from uniting or taking root, thus achieving a temporary emergency contraceptive effect. However, the side effects of this drug are large and can interfere with endocrine function and cause menstrual disorders, so women are advised to observe 1-2 more periods and prepare for pregnancy with regular menstruation. In addition, during the first 3 months of pregnancy, women can take folic acid, drink more water, maintain hygiene, do not eat cold and stimulating food, and improve the immunity of the body. Also, pay attention to keeping the abdomen warm and avoid strenuous exercise and heavy physical activities.