After ovulation, the combination of sperm and egg begins to produce chorionic gonadotropin, which can be detected in the blood for 10 days afterward. After intercourse, the sperm and egg combine to form a fertilized egg, and then with the help of peristalsis of the fallopian tube and the swinging of the cilia, the fertilized egg enters the uterine cavity to successfully implant, which is basically the success of the pregnancy. So 1-2 weeks after intercourse can be intrauterine pregnancy. After pregnancy, the embryo in the uterine cavity slowly divided and differentiated, gradually increased in size and developed into a fetus, the mother’s body endocrine hormone levels, will therefore produce great changes, pregnant women’s moods will also be very ups and downs. Pregnant women try to avoid strenuous exercise in the early stages of pregnancy, maintain a good mood, diet should be light and nutritious, avoid spicy and stimulating foods and high oil, high salt, barbecue and other foods, eat more fresh fruits and vegetables. And supplement folic acid tablets to prevent fetal optic neural tube malformation, and actively cooperate with the doctor to do a good job of early pregnancy examination.