Human Reproduction Update Advance Access published online on August 25, 2005
Human Reproduction Update, doi:10.1093/humupd/dmi032
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1 The Danish Epidemiology Science Centre, University of Aarhus, Aarhus C, Denmark; Department of Epidemiology, UCLA School of Public Health, Los Angeles, CA, USA
* To whom correspondence should be addressed. Subfecundity is a frequent and serious problem that may sometimes be preventable, but we need to know more about its determinants. Different epidemiologic designs are available. The best of these use prospectively collected data from the population, but they are time consuming, expensive and often hampered by low-participation rates. Most patients undergoing infertility treatment are closely monitored for clinical reasons, making it feasible to use secondary data to study the period from conception to implantation and pregnancy. In spite that infertility patients are highly selected, there are specific exposure-effect relations that can be studied in cohorts of infertility patients. These patients offer a potentially useful setting for studying exposures that operate late in fertilization, whereas the designs may be inadequate to identify exposures that cause reduced sperm counts, anovulation and total occlusion. The clinical sampling and the treatment set limitations for what can be studied. In certain situations, infertile patients can, however, provide useful epidemiologic evidence for learning about the causes of subfecundity.
Received October 21, 2004
Revised June 29, 2005
Accepted July 19, 2005
Article
Using infertile patients in epidemiologic studies on subfecundity and embryonal loss
2 Department of Occupational Medicine, Aarhus University Hospital, Aarhus, Denmark
3 The Danish Epidemiology Science Centre, University of Aarhus, Aarhus C, Denmark
4 Department of Gynaecology and Obstetrics, Aarhus University Hospital, Aarhus, Denmark
J. Olsen, E-mail: jo{at}soci.au.dk
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