Drinking a glass of liquor during the first 18 days of pregnancy, when the fertilized egg is formed, does not have a great impact on the fetus. If it affects the fetus at this time, it may lead to miscarriage, failure of the fertilized egg to settle, or biochemical pregnancy; if these symptoms do not occur during this period, it does not affect the gestational sac and the pregnancy can proceed normally. However, if you drink liquor after 18 days of the formation of the fertilized egg, it may affect the growth and development of the fetus, leading to fetal malformations or cause the fetus to have neurological effects, which requires timely examination, and you should do Down’s syndrome screening and 4D examination during pregnancy to exclude fetal problems, and if all the tests are normal during pregnancy, you can let the baby be born. If there are problems with the fetus during the pregnancy, the pregnancy should be terminated in time, because drinking alcohol in early pregnancy can affect the growth of the fetus and may have certain side effects, but this is related to the amount of alcohol consumed.