OBJECTIVE: To determine: 1 what percentage of men in an infertile relationship will have a semen abnormality, 2 the average value for each semen parameter in this group of men, 3 the distribution of abnormal semen parameters in this group, and 4 if our data support the hypothesis that sperm concentration is declining. DESIGN: Retrospective cohort study. SETTING: County hospital university-based infertility clinic. PATIENT(s): Male partners of women presenting for an infertility evaluation. INTERVENTION(s): Semen specimens were collected after 2-5 days of abstinence. MAIN OUTCOME MEASURE(s): Sperm concentration, motility, and morphology. RESULT(s): Fifty-two percent of samples had at least one sperm abnormality based on World Health Organization criteria. Fifty-one percent had an abnormality in sperm motility, 18% in sperm concentration, and 14% in sperm morphology. Four percent of the patients were azoospermic. CONCLUSION(s): No decline in sperm density was revealed in semen collected by men presenting for an initial screening semen analysis.
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