Background: Epidemiologic studies have demonstrated that ambient concentrations of particulate matter < 2.5 μm (PM) are associated with reduced fecundability, the per cycle probability of conception. The specific constituents driving this association are unknown.
View Article and Find Full Text PDFStudy Question: To what extent is male physical activity (PA) associated with fecundability (per-cycle probability of conception)?
Summary Answer: Preconception levels of vigorous, moderate, or total PA were not consistently associated with fecundability across Danish and North American cohorts, but there was suggestive evidence that bicycling with a 'soft, comfort seat' was associated with reduced fecundability in both cohorts, especially among males with greater BMI.
What Is Known Already: Among males, some studies indicate that moderate PA might improve fertility, whereas vigorous PA, especially bicycling, might be detrimental.
Study Design, Size, Duration: We assessed the association between male PA and fecundability among couples participating in two preconception cohort studies: SnartForaeldre.
Background: The use of fertility indicators to predict ovulation has largely been studied for contraceptive purposes, while less so as fertility-promoting tools.
Objective: To investigate the association between fertility indicators and fecundability in Danish women trying to conceive.
Methods: Web-based preconception cohort study.