First of all, about six months before you get pregnant, you should go to the hospital for a comprehensive gynecological examination and consult with your doctor about all matters related to pregnancy. If you are taking birth control pills, you should stop using them six months before you are ready to get pregnant and switch to instrumental contraception; if you have had an abortion, you should get pregnant six months after the abortion. In addition, during the six months before pregnancy, you should do the same as in early pregnancy, try to avoid feverish diseases, viral infections, exposure to radiation and chemical drugs, and do not lose weight, pay attention to the intake of various nutrients in your diet, and relax fully mentally to keep a good state of mind to welcome the arrival of a new baby. Take your basal body temperature every morning before you wake up and make a record of it, so that you can have a comprehensive understanding of your ovulation and reproductive endocrine function and have a more accurate idea of the conception period. Rubella vaccination before pregnancy Rubella is an acute infectious disease caused by the rubella virus. If a pregnant woman is infected with the rubella virus during the third month of pregnancy, the virus can infect the fetus through the placenta. Rubella can develop throughout the year, with a higher incidence in the summer. The incidence of fetal malformation is 100% in pregnant women infected within 2 months of pregnancy, 26% in those infected after 2 months, and 4% in those infected after 6 months. The incidence of rubella is mainly determined by the immune status of women of childbearing age and the prevalence of rubella, which is protected when the rubella antibody titer in pregnant women is greater than 1:20. According to epidemiological surveys, most women of childbearing age throughout China are positive for rubella antibodies, but not many reach protective levels. To avoid the risk of rubella to pregnant women and fetuses, the key is prevention. Vaccination of women of childbearing age with live rubella vaccine is an immunization program for direct protection. After vaccination, the positive antibody conversion rate is over 95% and the protection rate is over 90%, but avoid conception within 3 months after vaccination. Wind vaccine is given once and the protection lasts for about 10 years without adverse reactions, which is safe and effective. Pre-conception folic acid supplementation at the right time Neural tube deformity is a serious birth defect disease, accounting for about one-third of all birth defects. Folic acid is a water-soluble vitamin found in animal liver, kidney, green vegetables, potatoes and wheat bran, with the highest content in green leafy vegetables. However, because folic acid is not heat-resistant, it is often lost by about half during processing and storage, thus causing a deficiency of folic acid in the human body. Currently, about 30% of women of childbearing age in China are deficient in folic acid, and the situation of folic acid deficiency is more serious for pregnant women because they have a greater demand for folic acid. Pregnant women need 0.4 mg of folic acid daily, while the general dietary intake of folic acid is only 0.05 milliacid supplements. It is convenient to take and can supplement the maternal and fetal needs for folic acid during pregnancy without worrying about how much folic acid is consumed in the diet, and is a suitable method to promote the prevention of neural tube abnormalities. Folic acid supplements can not only prevent the occurrence of neural tube abnormalities, but also have specific effects on spontaneous abortion, intrauterine growth retardation and anemia of pregnant women. Iodine is an essential trace element that cannot be synthesized by the human body, and it is also the main component of thyroxine, a hormone that is extremely important for the metabolic activity and growth of the body. The daily physiological requirement for iodine is 100 micrograms to 200 micrograms, and should not be less than 50 micrograms, otherwise iodine deficiency diseases may result. However, due to certain problems in the distribution of iodized salt and errors in our daily cooking and processing methods, iodine deficiency should still be taken seriously enough. Iodized salt should be bought as it is eaten, stored for a long time, covered with a lid to avoid sunlight, protected from moisture, tied with a string at the mouth of the bag containing iodized salt and kept in a cool place. Do not use deep-fried salt; put salt when the dish is cooked, or put salt when stewing. Pregnant women have a greater demand for iodine because of the dual demand of mother and child, so they should eat more kelp, jellyfish, shrimp, oysters, yellowtail, seaweed, shrimp skin, nori and soy products to replenish the iodine in their bodies.