Charlene Brazil

TL;DR: Threshold values for sperm concentration, motility, and morphology can be used to classify men as subfertile, of indeterminate fertility, or fertile and none of the measures are diagnostic of infertility.

TL;DR: In this paper, the authors reported reduced sperm concentration and motility in fertile men in a U.S. agrarian area (Columbia, MO) relative to men from urban centers (Minneapolis, MN; Los Angeles, CA; New York, NY).

TL;DR: Sperm concentration was significantly lower in Columbia, Missouri, than in New York, New York; Minneapolis, Minnesota; and Los Angeles, California, and between-center differences remained significant in multivariate models that controlled for abstinence time, semen analysis time, age, race, smoking, history of sexually transmitted disease, and recent fever.

TL;DR: The results suggest that stressful life events may be associated with decreased semen quality in fertile men and the experience of psychosocial stress may be a modifiable factor in the development of idiopathic infertility.

TL;DR: Data suggest that maternal beef consumption, and possibly xenobiotics in beef, may alter a man's testicular development in utero and adversely affect his reproductive capacity.