Loading...
Risk for miscarriage (spontaneous pregnancy loss before 20 weeks' gestation) can be difficult to quantify. Prevalence of miscarriage was studied in a Norwegian cohort of >420,000 pregnancies from 2009 through 2013 that resulted in live birth (71.0%), induced abortion (18.3%), miscarriage (10.4%), and stillbirth (0.3%).
Excluding induced abortions, risk for miscarriage varied with maternal age (17% [<20 years], 11% [20–24], 10% [25–29], 11% [30–34], 17% [35–39], 33% [40–44], and 57% [≥45]). Analysis adjusted for maternal age showed that miscarriage risk rose among women with previous miscarriages (1 prior miscarriage: adjusted odds ratio [aOR], 1.54; 2 prior miscarriages: aOR, 2.21; 3 prior miscarriages: aOR, 3.97). Miscarriage risk was modes…