The precautions for girls during preparation for pregnancy include balanced diet, taking folic acid tablets and maintaining a healthy lifestyle, which need to be analyzed specifically. 1. Balanced diet: Eat a balanced diet during preparation for pregnancy, don’t be picky and eat only a single food. Eat more fresh fruits and vegetables and supplement high quality protein. Do not eat spicy and stimulating food. 2. Take folic acid tablets: Folic acid tablets have the function of preventing fetal brain neurological malformation. It is recommended that women take folic acid tablets 3 months before pregnancy preparation, which can promote the development of the child’s nervous system. 3. Maintain a healthy lifestyle: Ensure adequate sleep, do not stay up late, exercise properly, and improve the body’s immunity. Quit smoking and drinking, avoid contact with toxic and harmful physical and chemical substances. Girls should go to the hospital for a physical examination during the preparation for pregnancy, to understand the physical condition, scientific preparation for pregnancy.