Trends in global semen parameter values

• 来源期刊: 亚洲男性学杂志（英文版）
• 年，卷（期）: 2013,（2）
• 页码范围: 169-173
• 页数: 5页
• 语种: 英文
• DOI: 10.1038/aja.2012.143

摘要

Allegations for a worldwide decline in semen parameter values have not withstood scientific scrutiny.Methodological flaws in an influential 1992 paper are summarized here,and studies that have been published since 1992 are reviewed.Of the 35 major studies of time trends in semen quality reviewed here,eight (a total of 18109 men) suggest a decline in semen quality;21 (112 386 men) show either no change or an increase in semen quality;,and six (26 007 men) show ambiguous or conflicting results.The cause (or causes) of the geographical and temporal variations in semen parameter values reported by these diverse studies deserve further investigation.