To shed light on the controversial question of whether there is a falling trend in sperm count, the authors reviewed 185 studies providing sperm count data in sperm samples collected between 1973 and 2011(star). The meta-regression analysis indicated that in these four decades sperm concentration decreased by over 50% in men from western countries. The decline of 1.4% per year showed no signs of slowing in the most recent period.
机构:
Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Chinese Agr Policy, Beijing, Peoples R ChinaChinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Chinese Agr Policy, Beijing, Peoples R China
Zhang, Linxiu
Dong, Yongqing
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Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Chinese Agr Policy, Beijing, Peoples R China
Univ Chinese Acad Sci, Beijing, Peoples R ChinaChinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Chinese Agr Policy, Beijing, Peoples R China
Dong, Yongqing
Liu, Chengfang
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Peking Univ, Sch Adv Agr Sci, China Ctr Agr Policy, Beijing, Peoples R ChinaChinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Chinese Agr Policy, Beijing, Peoples R China
Liu, Chengfang
Bai, Yunli
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Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Chinese Agr Policy, Beijing, Peoples R ChinaChinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Chinese Agr Policy, Beijing, Peoples R China