Semen quality of 1559 young men from four cities in Japan: a cross-sectional population-based study.

ABSTRACT: To provide information of semen quality among normal young Japanese men and indicate the frequency of reduced semen quality. Cross-sectional, coordinated studies of Japanese young men included from university areas. The men had to be 18-24 years, and both the man and his mother had to be born in Japan. Background information was obtained from questionnaires. Standardised and quality-controlled semen analyses were performed, reproductive hormones analysed centrally and results adjusted for confounding factors. Four study centres in Japan (Kawasaki, Osaka, Kanazawa and Nagasaki). 1559 men, median age 21.1 years, included during 1999-2003. Semen volume, sperm concentration, total sperm count, sperm motility, sperm morphology and reproductive hormone levels. Median sperm concentration was 59 (

SUBMITTER: Iwamoto T 

PROVIDER: S-EPMC3641477 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature