NEW YORK (Reuters Health) - The more a man ejaculates each week, the lower his sperm levels fall, new research shows. However, this ejaculatory frequency only partly explains why a man's sperm count varies widely each time it's checked. The findings, which appear in the medical journal Fertility and Sterility, are based on a study of 27 healthy men who provided monthly semen samples and responded to questionnaires regarding ejaculatory frequency, duration of abstinence, and episodes of fever. The subjects were followed for 16 months. No seasonal variations in sperm levels, movement, or shape were seen, lead author Dr. Elisabeth...
