Alcohol can enter the fetus through the placenta and cause fetal alcohol syndrome, which may affect the fetus mainly in terms of abnormal appearance and developmental disorders, and may also cause miscarriage due to alcohol consumption: 1, abnormal appearance: alcohol may cause fetal malformation, facial malformation such as a series of symptoms such as obvious disproportion between the left and right of the fetus’ face, or increase the risk of fetal cleft lip and nasal malformation, and also Small head, small eyes, short chin, flat and narrow face may appear; 2, developmental disorders: alcohol may cause placental vasoconstriction, affecting the fetal blood supply, possibly causing small fetal development, or even fetal growth restriction. It may also affect fetal brain development, intellectual development, memory development, and after birth may have short stature, poor memory and inattention; 3, miscarriage: if pregnant women drink too much alcohol, fetal developmental abnormalities may cause miscarriage. Therefore, since the preparation for pregnancy, you should pay attention to quit smoking and alcohol, and not to drink alcohol during pregnancy, so as not to affect the development of the fetus, resulting in fetal malformation, miscarriage and other adverse consequences. At the same time, it is important to take folic acid during pregnancy to prevent fetal neural tube abnormalities and to stay away from toxic and harmful environments to ensure healthy fetal development.