How long it takes to prepare for pregnancy is usually between 3-6 months. Depending on the specific situation, if you are usually healthy and have no bad habits, you can get pregnant in one month. Regular smoking, drinking and staying up late at night need to be adjusted in order to eugenically improve the chances of conception, which will naturally prolong the preparation time, and you can get pregnant after about three months. Long time working in the industry with radiation, first to get out of work, at least six months later, to prevent pregnancy easily lead to miscarriage, premature birth, deformities. Pay attention to strengthen nutrition, eat more high-protein food and nutritious vegetables and fruits, to enhance physical fitness and prevent colds. You can take folic acid tablets orally, one tablet a day.