Fertility actually includes two types of pregnancy, the first is natural pregnancy, about 80-90% can actually get pregnant naturally, but there are some patients with more serious conditions, it is necessary to use assisted conception, such as in vitro fertilization, is it necessary to do in vitro fertilization for weak sperm? No, it is not. First of all, it depends on the degree of weak spermatozoa, for example, the normal human forward motion sperm is 32%, more than 32% is 60 points, in 10%-32% belongs to mild weak spermatozoa, this kind of patients can actually be treated through exercise and find out the cause, most of them can get pregnant naturally. There is also moderate weak spermatozoa, which is the forward motion sperm accounting for 10%-20%. These patients can also find the cause through lifestyle adjustments, such as varicocele, and can get pregnant naturally through lifestyle adjustments, medication, and doctor’s guidance. In severe cases of weak spermatozoa, where the forward-moving spermatozoa are less than 10%, the first preference is for patients to have their own offspring through natural pregnancy, but this patient, through finding the relevant causes, lifestyle adjustments and medication, if the spermatozoa do not improve and cannot conceive naturally for more than two years or more, still prefers assisted conception, that is, IVF would be more appropriate.