Home  |   Archive  |   Online Submission  |   News & Events  |   Subscribe  |   APFA  |   Society  |   Contact Us  |   中文版
Search   
 
Journal

Ahead of print
Authors' Accepted
    Manuscripts
new!
Current Issue
Archive
Acknowledgments
Special Issues
Browse by Category

Manuscript Submission

Online Submission
Online Review
Instruction for Authors
Instruction for Reviewers
English Corner new!

About AJA

About AJA
Editorial Board
Contact Us
News

Resources & Services

Advertisement
Subscription
Email alert
Proceedings
Reprints

Download area

Copyright licence
EndNote style file
Manuscript word template
Guidance for AJA figures
    preparation (in English)

Guidance for AJA figures
    preparation (in Chinese)

Proof-reading for the
    authors

AJA Club (in English)
AJA Club (in Chinese)

 
Abstract

Volume 15, Issue 2 (March 2013) 15, 179–183; 10.1038/aja.2012.105

Counting your sperm before they fertilize: are sperm counts really declining?

Alexander W Pastuszak1,2 and Dolores J Lamb1,2,3

1 Scott Department of Urology, Baylor College of Medicine, Houston, TX, USA
2 Center for Reproductive Medicine, Baylor College of Medicine, Houston, TX, USA
3 Department of Molecular Cell Biology, Baylor College of Medicine, Houston, TX, USA

Correspondence: Dr DJ Lamb, (dlamb@bcm.edu)

Received 16 August 2012; Revised 25 November 2012; Accepted 10 October 2012 Advance online publication 21 January 2013

Abstract

A purported global decline in sperm counts has been a source of controversy since the early 1990s. Numerous studies performed since then, as well as re-analysis of the original data, show either no changes, or even increases, in sperm concentrations over time. In this review, we discuss the 1992 meta-analysis that initiated the continuing debate on whether sperm concentrations are declining, and the community discussion surrounding it over the past two decades. We also highlight studies evaluating sperm concentrations performed since the initial study that produced different results, and conclude that no definitive cause for a decrease in sperm counts has been established, and the effects of geography and environment on sperm counts are unclear.

PDF | PDF | 中文摘要 |

 
Browse:  3519
 
Copyright 1999-2017  Shanghai Materia Medica, Shanghai Jiao Tong University.  All rights reserved