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2004 MAR 4 - (NewsRx.com & NewsRx.net) -- Detailed studies set the standard for evaluating fertility and the environment.
According to published research from the United States, "although there has been growing concern about the effects of environmental exposures on human fertility, standard epidemiologic study designs may not collect sufficient data to identify subtle effects while property adjusting for confounding. In particular, results from conventional time to pregnancy studies can be driven by the many sources of bias inherent in these studies."
"By prospectively collecting detailed records of menstrual bleeding, occurrences of intercourse, and a marker of ovulation day in each menstrual cycle, precise information on exposure effects can be obtained, adjusting for many of the primary sources of bias," argued C. Tingen and colleagues, NIH, National Institute of Environmental Health Sciences, Biostatistics Branch.
"This article provides an overview of the different types of study designs, focusing on the data required, the practical advantages and disadvantages of each design, and the statistical methods required to take fall advantage of the available data."
"We ...
Source: HighBeam Research, Detailed studies set the standard for evaluating fertility and the...