Alcohol consumption is not recommended during the preparation for pregnancy, as it may cause ovulation dysfunction, affect the quality of eggs, and even lead to fetal malformation and mental retardation. Alcohol may cause endocrine disorders in the body, leading to ovulation disorders, and it may affect the quality of the eggs, which in severe cases may lead to malformations and miscarriage after pregnancy. At the same time, the preparation period may include early pregnancy, if it happens to be in the early pregnancy drinking, it may trigger fetal alcohol syndrome, resulting in fetal malformation or mental retardation. Therefore, drinking alcohol during pregnancy preparation is not recommended. In addition to this, it is recommended to avoid smoking, contact with poisons, medications and other substances and exposure to toxic environments during preparation for pregnancy.