Before pregnancy conditioning, you need to pay attention to the following aspects: 1, diet: eat more fresh, safe and hygienic food, 3 months before pregnancy and 3 months after pregnancy regular supplementation of folic acid, if necessary, supplementation of trace elements, such as iron, zinc, calcium, iodine. Micronutrient deficiency can cause harm to fetal bone and brain nerve development, and folic acid deficiency can increase the incidence of fetal neural tube malformation; 2. Life: regular work and rest, adhere to proper exercise, and keep weight in the normal range; 3. Stay away from harmful substances: such as paints, pesticides, rays, heavy metals, and avoid contact with harmful substances released by building decoration materials, such as formaldehyde, benzene, ketones, etc.; 4. Avoid contact with Pets: Toxoplasma gondii is often found in the feces and fur of cats and dogs, and close contact can lead to infertility. Infection with Toxoplasma gondii in early pregnancy can lead to fetal malformation, and can also be manifested as recessive infection without clinical symptoms.