Caffeine and caffeinated beverage consumption and risk of spontaneous abortion

Human Reproduction
K A HahnE E Hatch

Abstract

Is caffeine and caffeinated beverage consumption associated with the risk of spontaneous abortion (SAB)? While preconceptional caffeine consumption was not materially associated with an increased risk of SAB, consumption during early pregnancy was associated with a small increased risk of SAB, although the relation was not linear. Caffeine has been hypothesized as a risk factor for SAB since the 1980s; however, results from previous studies have been conflicting. This prospective cohort study included 5132 Danish women planning pregnancy and enrolled from 2007 to 2010. Participants were women who conceived after entry into the Snart-Gravid cohort and who were aged 18-40, in a stable relationship with a male partner, and did not use fertility treatments to conceive. Women reported their daily caffeine and caffeinated beverage consumption on questionnaires before conception and during early pregnancy. All exposure measurements were prospective with respect to outcome ascertainment. We estimated hazard ratios (HRs) of SAB for categories of caffeine consumption in milligrams (mg) per day and the corresponding 95% confidence intervals (CIs) using Cox proportional hazards regression models with gestational weeks as the time scale. Th...Continue Reading

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