On the 28th day of pregnancy, most pregnant women do not have early pregnancy reactions and only show menopause. A small number of pregnant women may have early pregnancy reactions at this time, including loss of appetite, nausea and vomiting, weakness and drowsiness, etc. However, not every pregnant woman will have early pregnancy reactions. However, not every pregnant woman will have early pregnancy reaction, and very few pregnant women may not have early pregnancy reaction during the whole pregnancy. If a woman with regular menstrual cycle has sexual intercourse during ovulation, the early pregnancy reaction usually occurs around 40 days after menopause, i.e. around 40 days of pregnancy, because the level of estrogen and HCG in the body increases significantly, which affects the function of the gastrointestinal tract and can lead to nausea and vomiting, loss of appetite, etc. It will reach the peak around 2 months of pregnancy, and the symptoms will gradually decrease after 2 months, and the early pregnancy reaction will disappear in most pregnant women around 3 months. The symptoms will gradually decrease after 2 months, and most pregnant women will disappear around 3 months. In addition, as pregnancy progresses, pregnant women may gradually experience breast enlargement, deepening of vulva color, increased vaginal discharge and frequent urination. It is important to actively take folic acid supplements in early pregnancy to prevent fetal neural tube abnormalities. Intercourse is prohibited in the early 3 months of pregnancy as well as in the late 3 months of pregnancy to avoid miscarriage and premature delivery.