1.What is oligospermia and can it be diagnosed with less than 20 million sperm/ml? According to the WHO 5th edition criteria, 3 consecutive semen tests with sperm concentration <15 million/ml or total sperm count <39 million are considered oligospermia. The diagnosis of oligospermia cannot be made solely on the basis of one semen test. 2.Does oligospermia affect fertility? To what extent will it seriously affect the fertility? Oligospermia may not necessarily lead to no pregnancy, but it will reduce the chances of natural pregnancy. If the diagnosis of oligospermia is met, natural conception will be affected. 3.Does oligospermia affect the quality of the fetus? Oligospermia only means that the number of sperm is low and the chance of pregnancy is reduced, but it has nothing to do with the quality of the fetus. 4.What is oligospermia? According to the fifth edition of WHO standards, weak spermatozoa are defined as having a percentage of forward-moving sperm <32% and a percentage of motile sperm <40% in three consecutive semen test reports. 5.Does weak sperm affect fertility? To what extent will it seriously affect fertility? Like oligospermia, weak sperm reduces the chance of natural conception, but it is not necessarily impossible to conceive naturally. If the diagnosis of weak spermatozoa is met, natural conception will be affected. 6. Does weak sperm affect the quality of the fetus? No. Weak spermatozoa only means that the patient's sperm vitality is poor and the chance of pregnancy is reduced, but it has nothing to do with the quality of the fetus. 7.Is there a high incidence of oligospermia and weak sperm? Do they often occur at the same time? The incidence of oligospermia and weak spermatozoa is high, often appearing at the same time, mostly related to daily living habits, diet and rest habits. 8.Is oligozoospermia hereditary? There are various causes of oligospermia, genetic factors are one of the causes, if the Y chromosome of the patient with oligospermia has a microdeletion, there will be male and male genetic, that is to say, the next generation using the patient's sperm if it is a boy, the Y chromosome has a higher chance of microdeletion, but health is generally not a problem; if it is a girl, there is no effect. Other causes of oligospermia and hypospermia do not have a genetic predisposition.