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Male Fecundity and Psychological Stress
Title:Effects of Psychological Stress on Human Semen Quality
Author: L.Fenster et al.
Address:Berkeley, California
Source:Journal of Andrology 18: 194-202 ( March / April)1997
Summary:Decreased semen quality has long been associated with decreased fertility. The relationship between psychological stress and sperm concentration, motility and morphometry were investigated in a prospective study of 157 patients. Psychological job stress and life event stress were assessed by telephone interview. Sperm-kinematic and nuclear-morphometric variables were measured using computer assisted image analysis(CASA). Sperm concentration, percent motility, and semen volume were determined by objective visual methods. Multiple linear regression was utilized for each semen variable examining its relationship to stress and controlling for possible confounders. A relationship was not implicated between stress at work , total number of life events and semen quality . Reduction in straight line velocity and percent of progressively motile sperm was associated with the recent death of a close family member and was marginally associated with an increase in the fraction of sperm with larger and more tapered nuclei. This association suggests that stress following the death of a close family member may temporarily cause a decrease in male fecundity.
Comment:The validity of their testing methods were probably better for the semen parameters than telephone interview assessment. The stress may be a matter of degree and there may have been few under extreme stress. This would be supported by reduction of sperm counts after death of a family member. The relationship between stress and infertility is easily seen subjectively, but remains hard to quantify objectively.