Pregnancy can be detected as early as 8-9 days after ovulation with hCG in urine or blood. 5 weeks of pregnancy, i.e. about 35 days after menopause, will bring about different degrees of early pregnancy feeling. In the early stage of menopause, some women will feel bitterness in their mouth, tastelessness of food, fear of cold, nausea, aversion to oil, general weakness, easy drowsiness and other conditions, which are all manifestations of early pregnancy reaction. There are individual differences in the severity of early pregnancy reactions, and there are various manifestations, most of which will disappear on their own after 12 weeks of pregnancy. After pregnancy, pregnant women are affected by estrogen and progesterone and their breasts gradually grow, so they may feel mild swelling, tingling and tenderness in their breasts, which is more obvious in first-time mothers. Daily oral folic acid is recommended until the third trimester to prevent fetal neural tube abnormalities and reduce the incidence of gestational hypertension, spontaneous miscarriage and fetal growth restriction, premature birth and low birth weight of the newborn. Ultrasonography can be performed at 6 weeks of pregnancy, i.e. around 42 days of menopause, to determine whether the pregnancy is intrauterine and the development and survival status of the embryo.