Drinking alcohol during pregnancy preparation may have potential adverse effects on the normal function of conception and the development of the baby. During pregnancy preparation, if you drink a lot of alcohol or drink frequently, it can affect the normal function of the ovaries and prevent them from ovulating normally or the quality of the eggs that are discharged is not good, which can easily lead to failure to conceive or poor quality of the embryo sac after pregnancy, which can lead to miscarriage in the early stages of pregnancy. If you are pregnant but have not yet been confirmed to drink alcohol, large amounts of alcohol can affect the normal development of the embryo, which may cause miscarriage and may lead to fetal malformation and fetal mental retardation. The adverse effects of alcohol consumption during pregnancy preparation on pregnancy increase with the number of drinks and the amount of alcohol consumed.