If you are having intercourse on the day of drinking and have an unplanned pregnancy, it is recommended to keep it for the time being and go to the hospital obstetrics and gynecology department to have a uterine ultrasound and other aspects examined to see if the fetus is developing normally. If in the early stages of pregnancy, alcohol affects the fetus and causes poor fetal development and easy miscarriage, if the fetus can develop normally, it should not be a big problem. It is recommended to go to the hospital for Down’s screening test during 15-20 weeks of pregnancy to exclude Down’s syndrome fetus. During the 22-26 weeks of pregnancy, you need to cooperate with the doctor for 4D ultrasound examination to confirm whether the fetus is developing normally. From the perspective of eugenics, both spouses need to stop smoking and drinking during pregnancy preparation to avoid any impact on the fetus. However, the occasional drink will not affect the fetus too much, so there is no need to worry too much and keep your mood relaxed.