It is easy to get pregnant when you have intercourse once during 2-3 days of ovulation. Ovulation generally refers to the day of ovulation and the 5 days before and 4 days after ovulation, a total of 10 days. A reasonable sexual arrangement during this period can greatly increase the chance of pregnancy and also help to improve the quality of male sperm. Women can use ovulation test strips or go directly to the hospital for ultrasound to monitor the development of follicles and determine the ovulation period, which can improve the probability of conception. It is not recommended to have intercourse for several days in a row during ovulation. It is better to space out the intercourse to improve the chances of pregnancy. After entering the vagina, the sperm can survive in the woman’s body for 2-3 days. After the egg is released, it can survive for about 24 hours without fertilization. Missing ovulation can lead to the death of the egg if sex is not arranged properly, thus losing the chance of pregnancy. In addition, during pregnancy preparation, women should also take more rest, eat a reasonable diet, take appropriate folic acid supplements and keep their mood relaxed.