Shaukat S, et al. - Researchers examined how prepregnancy maternal BMI influences adverse pregnancy outcomes (POs) in a low-risk, multiethnic population. In addition, they calculated related population attributable fractions (PAFs). In this retrospective cohort study, 1,134 nulliparous women of 50 nationalities (classified into Arab and non-Arab ethnicity) in Qatar who had their first antenatal visit at a Primary Healthcare Corporation (PHCC) facility in June 2016–March 2017 and their PO at a Hamad Medical Corporation facility before 10 November, 2017, were evaluated. As per findings, the risk for gestational diabetes mellitus (GDM) and cesarean section was high among overweight Arab women and women with obesity. A high risk for preeclampsia was evident among non-Arab women with obesity. PAFs showed that if all mothers had normal prepregnancy BMI, 41.63% of preeclampsia, 17.36% of pregnancy-induced hypertension, 17.17% of large for gestational age, 15.89% of preterm deliveries, 14.75% of GDM and 13.99% of cesarean sections could be avoided. Findings thereby emphasize targetting overweight and women with obesity in Qatar earlier in their pregnancy, preferably prior to getting pregnant, in contrast to existing PHCC protocol.