Most people believe that simply having sex without a contraceptive is likely to result in pregnancy.
But the reality is that the chances of becoming pregnant in any given month are more like 25 percent. A number of factors can make conception difficult. Sperm motility and sperm count are the culprits in half of infertility cases. In addition, women who postpone having children until later in life may encounter more difficulties conceiving. In any situation, agonizing over infertility may be making matters worse by increasing stress.