Having a healthy and smart baby is not an easy task. There are a lot of preparations that parents-to-be have to do, such as: physically, it is best to make a fitness plan six months before pregnancy; have a comprehensive physical examination and vaccination; treat diseases that can affect pregnancy in time; stop taking various drugs including birth control pills; leave harmful working environment and stay away from pets, etc. In terms of diet, a balanced diet, balanced nutrition, attention to dietary hygiene, less processed food; if you have special nutritional problems, supplement them before pregnancy; increase the intake of micronutrients such as calcium and iron; start taking folic acid supplements 3 months before pregnancy to prevent fetal neural tube abnormalities; quit smoking, quit drinking, control the intake of coffee and soft drinks, etc. In addition, from the time they are ready to get pregnant, mothers-to-be should be fully prepared psychologically for the biggest and most wonderful change in their lives that is about to begin.