Hair straightening during pregnancy is still a big impact, try not to straighten your hair during pregnancy. Hair straightening requires the use of drugs, the use of drugs will contain a lot of chemical ingredients, these ingredients will have a certain impact on the fetus, so pregnant women try not to straighten hair. If you really want to straighten your hair, you can choose to move your pregnancy back. It is important to avoid all possible stimuli during the preparation period, in addition to not recommending hair straightening, hair coloring and nail polish should also try not to happen. It is recommended that couples who are preparing for pregnancy go to the hospital for a preconception eugenic health checkup to assess whether they are physically fit to get pregnant. During the preparation for pregnancy, you should quit smoking and drinking, develop good living habits, and do not stay up late. Exercise in moderation to maintain good health, avoid prolonged exposure to radiation or pollution, and get out of toxic and harmful working environment; keep a happy mood; avoid heavy physical labor. Preparation for pregnancy medication should be under the guidance of a doctor, carefully choose the right medication; women should start taking oral folic acid from 3 months before the planned pregnancy to prevent neural tube defects.