Found this article regarding ejaculation and sperm count
Sperm Levels Drop with Frequent Ejaculation
Tue 31 August, 2004 21:16
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 Carlsen and
colleagues, from Rigshospitalet in Copenhagen, note.
However, ejaculation frequency was higher in spring
months than in the winter months.
As noted, sperm levels fell as weekly ejaculatory
frequency increased. Compared with one ejaculation,
sperm level fell 29 percent with two ejaculations and
by 41 percent with three ejaculations. In contrast,
ejaculatory frequency seemed to have no effect on
sperm movement or shape.
The sperm characteristics noted in one sample often
differed greatly from those observed in a subsequent
sample from the same subject. This wide variation
dropped markedly when three semen samples were used
instead of two. Ejaculation frequency, duration of
abstinence, and the presence of a fever episode were
small contributors to this variation.
"The majority of the (this) variation remained
unexplained," the authors note.
The findings also suggest that "at least three semen
samples should be recommended to estimate an
individual's semen profile," they add.
SOURCE: Fertility and Sterility, August 2004.
