women s health issues
Problems With Sperm
Introduction
Men may have infertility if their sperm are too few in number, move too slowly, or are structurally abnormal or if the sperm's passage out of the body is blocked or disrupted. An increase in the testes’ temperature, certain disorders, injuries, and some medications and toxins can cause problems with sperm. Semen is analyzed, and sometimes genetic tests are done. Clomiphene, a fertility medication, may increase the number of sperm, but assisted reproductive technologies may be needed. (See also Overview of Infertility .) To be fertile, a man must have an adequate quantity of normal sperm and sperm must be able to fertilize the egg. Conditions that interfere with this process can make a man less fertile. 