Women are more likely to get pregnant when they are ovulating, which is usually about 14 days before the next menstrual period. Pregnancy is influenced by many factors, so women who are preparing for pregnancy need to know about it in advance and prepare for it well in order to provide favorable conditions for a smooth pregnancy. Pregnancy is the union of egg and sperm. After intercourse, the sperm will travel up the vagina to unite with the egg and conception will be possible, which requires not only the discharge of the egg, but also the full cooperation of the sperm. Usually, the normal menstrual cycle is about 28 days, and ovulation is about 14 days before the next menstrual period. Due to different factors such as personal constitution, lifestyle and diet, ovulation is within 5 days before and 5 days after the ovulation day, which makes it easier for women to conceive. Clinical studies have found that 24-30 years of age for women and 27-35 years of age for men is the appropriate age for conception. After 35 years of age, women’s fertility starts to decline gradually, so women at the right age can actively prepare for pregnancy. It usually takes 24-48 hours from ovulation to fertilization. After 48 hours, the possibility of conception is very low. Even for women who have not completed conception, they can have intercourse near the next ovulation period to increase the chance of conception. Women who have not conceived for a long time can go to the hospital with their partners for tests to determine if there are any abnormalities in egg and sperm development.