Women in preparation for pregnancy must go to the hospital to do pre-pregnancy checkups, pre-pregnancy checkups have a lot of items, from the whole body to the reproductive organs should be checked, as follows: 1, general checkups: including liver function, renal function, but also to check the syphilis, AIDS, hepatitis B, hepatitis C, but also to check the status of thyroid function, because hypothyroidism or hyperthyroidism can cause miscarriage, but also to check the blood and urine, there is no anemia, there is no protein in the urine. Urine routine, with or without anemia, urine with or without protein; 2, female endocrine examination: for example, check hormone six, to be in the menstrual period of 2-4 days to draw blood to check hormone six, to understand the ovarian function; 3, the virus four check: that is, before pregnancy there is no viral infections, especially women who have pets, must check the virus four, including toxoplasmosis, herpes simplex virus, cytomegalovirus and rubella virus, if there is a recent viral infection, especially women who keep pets, must check virus four, including toxoplasma, herpes simplex virus, cytomegalovirus and rubella virus. Rubella virus, if there is a recent viral infection, it is not possible to get pregnant, otherwise it will cause fetal malformation; 4, gynecological examination: do cervical cancer screening, such as cervical cancer smear TCT, cervical human papillomavirus HPV examination, cervix is not lesions, before considering to be able to get pregnant. Gynecological ultrasound should also be done to check the condition of the uterus, ovaries and endometrium. If all the above tests are OK, you should also take folic acid 3 months in advance to prevent fetal neural tube deformities.