You can get pregnant with weak spermatozoa, but the chances of getting pregnant are low. Weak spermatozoa is defined as having less than 32% forward-moving sperm in the semen parameters, or <40% total sperm motility. The causes of weak spermatozoa include congenital factors such as chromosomal abnormalities, endocrine abnormalities such as gonadotropin synthesis or secretion dysfunction, infectious factors such as mumps virus-induced orchitis, and immunologic factors such as the presence of antisperm antibodies. Patients with low sperm motility may have no obvious systemic symptoms, and the main manifestation is difficulty in pregnancy. If the primary cause is found, many patients with weak spermatozoa can improve their sperm quality, and most of them can still have children naturally. In cases where the treatment is not effective, or is accompanied by other diseases, or where the female partner is also accompanied by fertility diseases, the goal of impregnating the spouse can be achieved through appropriate assisted reproduction techniques. When abnormal sperm quality occurs, it is necessary to actively consult the doctor and follow the doctor's instructions for proper treatment.