The reasons for failure to conceive are innumerable. Because whatever it is , special treatment exists in every case. However, the methods and methods of diagnosing the causes can range from simpler and less expensive to more complex and more expensive. 1. Egg formation (for many reasons ovum is not produced). 2. If the ovary is closed or there is no activity. 3. As a result of a disease called endometriosis. 4. If there is a tumor in the uterus. 5. If there is hostile feeling towards the sperm in the uterus. The main reason in men is: 1. If the amount of sperm is low. 2. If the shape of the sperm is not normal. 3. If the movement of sperm is not normal. 4. If sperm is absent. 5. If the husband has a disability. Apart from this, it may not be due to joint problems and sometimes both of them may not have children without any reason. When no specific cause is found , it is called unexplained infertility.