The main precautions for couples to prepare for pregnancy are to take folic acid, maintain sufficient sleep and ensure regular sex life, and also to carry out some necessary pre-pregnancy screening. 1. Taking folic acid: In the process of preparing for pregnancy, couples need to actively take folic acid, which can prevent the fetus from brain tissue and neural tissue underdevelopment. 2. Maintain adequate sleep: when preparing for pregnancy, we must pay attention to sleep enough, and appropriate rest, try to maintain sufficient physical strength, for normal conception will have a certain role in helping. 3. Ensure a regular sex life: Preparing for pregnancy should pay attention to the regularity of sexual life, the number of times should not be too little or too much, preferably 2-3 times a week, and pay attention to sexual hygiene. 4. pre-pregnancy screening: 3-6 months before conception, couples can carry out the necessary pre-pregnancy screening, women need to check the vagina and cervix, and men mainly check the quality of semen, to ensure eugenics. Couples need to be in a good mood when preparing for pregnancy, and also need to change some bad habits such as smoking and drinking, in order to help successfully prepare for pregnancy.