Changes of semen parameters in Chinese fertile men in the past 25 years / 中华男科学杂志
National Journal of Andrology
; (12): 775-778, 2008.
Article
in Chinese
| WPRIM (Western Pacific)
| ID: wpr-309796
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To analyze the changes of seminal parameters in Chinese fertile men during the past 25 years.</p><p><b>METHODS</b>We collected semen samples from 5,834 fertile men in 14 different provinces (including Beijing) between 1980 and 2005 and retrospectively studied their seminal parameters, abstinence durations and total testis volumes by meta-analysis.</p><p><b>RESULTS</b>Compared with the first 15 years, a significant decrease was observed in both sperm density and total number of sperm per ejaculate in the semen samples collected between 1996-2000 (P < 0.0001 and P < 0.05), but not obvious in those between 1996-2000 and after 2005 (P > 0.05). As for sperm motility, no time-related changes were noted (P > 0.05) except a reduction with the increase of age.</p><p><b>CONCLUSION</b>There was a decline in sperm density and total number of sperm per ejaculate in Chinese fertile men over the past 25 years, although not significant in the latter 10 years since 1996, but with no time-related changes in sperm motility.</p>
Full text:
Available
Database:
WPRIM (Western Pacific)
Main subject:
Semen
/
Sperm Count
/
Sperm Motility
/
China
/
Retrospective Studies
/
Fertility
Type of study:
Observational study
Limits:
Adult
/
Humans
/
Male
Country/Region as subject:
Asia
Language:
Chinese
Journal:
National Journal of Andrology
Year:
2008
Document type:
Article