The fact that a man can ejaculate semen but is unable to conceive is related to male factors, female factors and factors common to both men and women. 1. Male factors: diseases such as azoospermia and weak spermatozoa can lead to the absence or poor quality of sperms in the semen of men, which in turn leads to men being able to ejaculate semen but fail to get pregnant. 2. Female factors: vaginal deformities, cervicitis, uterine tumors, blocked fallopian tubes, abnormal ovarian development, severe malnutrition and other diseases, such as sperm immunity, female body fluid immunity abnormalities, etc., may lead to women can not be conceived normally. 3. Common factors for both men and women: the inability to conceive may also be related to other factors such as mental stress and prolonged late night. It is recommended that both men and women should consult a doctor in a timely manner to clarify the cause of the disease and carry out standardized treatment under the guidance of a specialist.