Decreased semen quality is a major factor of male infertility.

It does not necessarily mean an otherwise bad semen quality.

Environmental mutagens that are associated with decreased semen quality include the following:

Editor,- We wish to respond to the correspondence concerning our report on decreasing semen quality.

In our view, however, the cautious approach is not to ignore the epidemiological evidence of declining semen quality.

Do tests that check semen quality and both partners' hormone levels in the blood.

The better a man's semen quality is, the better chances he has to make a woman pregnant.

The main cause of male infertility is low semen quality.