Unhealthy sperm may cause pregnancy because some of the unhealthy sperm must be normal sperm, and if these sperm encounter the egg in the female fallopian tube abdomen, pregnancy can occur after fertilization is completed. But unhealthy sperm has a much lower chance of conceiving a woman than normal sperm, so for men who intend to prepare for pregnancy, if they find that their sperm is unhealthy, it is recommended that they go to the hospital to find the specific cause of the problem and target the unhealthy sperm to become healthy sperm, the chances of pregnancy will be greatly improved and the chances of fetal malformation and pre-eclampsia can be reduced.