Semen analyses in 1,283 men from the United States over a 25-year period: no decline in quality

To determine whether semen quality has changed in the United States over the last 25 years. Retrospective review. Three U.S. sperm banks, Cryogenic Laboratories, Inc. (Roseville, Minnesota), Idant Laboratories (New York, New York), and California Cryobank, Inc. (Los Angeles, California). Twelve hund...

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Bibliographic Details
Published in:Fertility and sterility 1996-05, Vol.65 (5), p.1009-1014
Main Authors: Fisch, Harry, Goluboff, Erik T., Olson, John H., Feldshuh, Joseph, Broder, Stephen J., Barad, David H.
Format: Article
Language:English
Subjects:
Adult
Analysis. Health state
Biological and medical sciences
Epidemiology
Fertility
Fundamental and applied biological sciences. Psychology
General aspects
geographic variations and changes over time in semen characteristics
Humans
Infertility, Male - epidemiology
Male
Mammalian male genital system
Medical sciences
Morphology. Physiology
Public health. Hygiene
Public health. Hygiene-occupational medicine
Regression Analysis
Retrospective Studies
Semen - physiology
Sperm Banks
Sperm Count
Sperm counts
Sperm Motility
Time Factors
United States
Vasectomy
Vertebrates: reproduction
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Summary:To determine whether semen quality has changed in the United States over the last 25 years. Retrospective review. Three U.S. sperm banks, Cryogenic Laboratories, Inc. (Roseville, Minnesota), Idant Laboratories (New York, New York), and California Cryobank, Inc. (Los Angeles, California). Twelve hundred eighty-three consecutive men who banked sperm before vasectomy from 1970 to 1994. None. Age at sample collection, sperm concentration, volume, motility, and days of abstinence before sample collection were determined for each man. Linear and multiple regression analyses were used to assess changes in these characteristics over time. Controlling for the effects of age and duration of abstinence, there was a slight but significant increase in mean sperm concentration but no change in either motility or semen volume over the 25-year period. Both sperm motility and semen volume decreased with increasing age at sample collection. Both sperm concentration and semen volume increased as a function of duration of abstinence. There were significant differences in mean (±SEM) sperm concentrations (106sperm/mL) and motilities between the different sperm banks with California lowest (72.7±3.1, 51.4%±1.1%, respectively), Minnesota higher (100.8±2.9, 56.0%±0.5%, respectively), and New York highest (131.5±3.5, 58.2%±0.5%, respectively). Our data show no decline in sperm counts over a 25-year period in 1,283 men who banked sperm before vasectomy at three distinct geographical sites in the United States.
ISSN:0015-0282
1556-5653
DOI:10.1016/S0015-0282(16)58278-8