Chlamydia and gonorrhea cause infertility in both men and women. HPV can damage the cervix. Other STDs can also cause damage. More on Sexually Transmitted Disease and PID . Toxoplasmosis, malaria, leprosy, and tuberculosis, though uncommon in the United States, can be a cause of infertility.
Mumps can cause infertility in a small fraction of men.
Problems with delivery or abortion can result in infection. Laceration, uterine injury, hemorrhaging which requires hysterectomy, as well as emotional trauma from a difficult experience can all impair future fertility. Stress from raising small children or post-abortion stress can also contribute to infertility. Eating disorders can be a major cause of infertility. Lead, toxic fumes, and pesticides are thought to be contributing factors for infertility in men and women.