title: Decline of semen quality among Chinese sperm bank donors within 7 years (2008-2014).
abstract: Semen from 5210 sperm bank donors was analyzed and trends in semen quality were evaluated at Shandong Human Sperm Bank between 2008 and 2014. After 2-7 days of abstinence, semen samples were collected. Measurements of semen volume, sperm concentration, sperm forward motility, and total sperm count were performed. There were significant declining trends in semen volume, sperm concentration, sperm forward motility, and total sperm count. Our results indicate that the quality of semen in this cohort of sperm donors had decreased during the study period.
authors.affiliation: Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.|Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China.|National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, China.|Key Laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.affiliation: Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China.|National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, China.|Key Laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China.|National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, China.|Key Laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China.
authors.forename: Xiao-Hui
authors.initials: XH
authors.lastname: Song
authors.affiliation: Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China.|National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, China.|Key Laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China.
authors.forename: Hao-Bo
authors.initials: HB
authors.lastname: Zhang
authors.affiliation: Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.|Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China.|National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, China.|Key Laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China.
authors.forename: Cheng-Yan
authors.initials: CY
authors.lastname: Xu
authors.affiliation: Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.|Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China.|National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, China.|Key Laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China.
authors.forename: Zi-Jiang
authors.initials: ZJ
authors.lastname: Chen
mesh_terms: D000328:Adult; D044466:Asian People; D002681:China; D015331:Cohort Studies; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D012189:Retrospective Studies; D055101:Semen Analysis / Q000706:statistics & numerical data* / Q000639:trends*; D013074:Sperm Banks / Q000706:statistics & numerical data*; D013076:Sperm Count; D013081:Sperm Motility; D014019:Tissue Donors; D055815:Young Adult