General anesthesia may have a certain effect on pregnancy, if the anesthesia during preparation for pregnancy has little effect, while general anesthesia during pregnancy will have a certain effect. 1. Preparation for pregnancy: women using general anesthesia during preparation for pregnancy, the reproductive cells may be affected, but the impact is not significant, and after a period of time the anesthetic will be metabolized from the body, the impact is gradually becoming smaller. 2. Pregnancy: the use of general anesthesia during pregnancy, may make the anesthetic through the blood circulation to reach the placental barrier and across to the embryo body, if it is the early stages of pregnancy may result in miscarriage, or the development of the fetus has an impact. If general anesthesia must be used during pregnancy, fetal teratogenesis, uterine contractions should be avoided to the maximum extent possible, or reduce the use of large amounts of anesthetic through the placental barrier.