Weak sperm refers to a reduced sperm count or low sperm motility. Whether or not the male partner’s weak sperm affects pregnancy needs to be analyzed according to the severity of the patient’s weak sperm. If the male partner has mild weak sperm, it usually does not affect pregnancy; if it is severe weak sperm, it may lead to infertility. Mild sperm weakening in the male partner is only a slight decrease in sperm quality and does not affect normal sex life. As long as you take care not to stay up late, not to be sedentary, stay away from smoking and alcohol, run every day and have regular sperm discharge. Through a period of conditioning, it is still possible to conceive naturally, so mild weak sperm usually does not affect pregnancy. Severe sperm weakening in men may affect their sex life and decrease their libido. Severe sperm weakening will result in zero forward sperm, which will prevent the sperm from traveling to the egg, thus preventing conception. It is difficult to treat patients with severe weak sperm, and most patients need to use assisted reproductive technology to achieve fertility. If the patient has weak sperm, it is recommended to go to the hospital in time, after a clear examination, and actively cooperate with the doctor for treatment.