作者: Shanna H. Swan , Eric P. Elkin
DOI: 10.1002/(SICI)1521-1878(199907)21:7<614::AID-BIES10>3.0.CO;2-B
关键词: Demography 、 Infertility 、 Toxicology 、 Sperm counts 、 Semen quality 、 Abstinence 、 Sperm 、 Sperm density 、 Biology 、 Random error 、 Population
摘要: … , but geographic variation as well. A carefully controlled, cross-sectional study of semen quality … , would be invaluable for assessing such geographic variation and its causes. Suppose …