Pre-conception testing is generally recommended to begin at 3-6 months. Generally, preconception examination is conducted 3~6 months before preparation for pregnancy, including both husband and wife, such an intervals can provide sufficient time for both husband and wife for treatment and conditioning, which is very favorable for carrying a healthy baby. In addition, some pre-pregnancy tests for women need to be conducted within 3~7 days after menstruation is clean, and it is best not to have sex before the test. Pre-conception checkups are physical examinations that couples go to the hospital for before they are ready to get pregnant, which can help families who want to have a baby to give birth to a healthy baby, thus realizing eugenics. Couples who have had a preconception checkup can have a baby without any worries.