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In 1997, the U.S. Food and Drug Administration endorsed the use of a combination estrogen and progestin oral contraceptive for emergency postcoital contraception.1 In 1998, the agency approved the fir...
Although regional differences in semen parameters have been described, little is known about the etiologic factors underlying these variations in male fertility status. We previously reported ...
Epidemiological studies of sperm quality are hampered by problems such as low participation rates and poor comparability of results due to methodological differences in semen analysis. More ob...
Over the course of recent decades, questions related to gender and sexuality have become key challenges for community health and well-being. First in relation to the study of population, slightly la...

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