Influence of pre-pregnancy BMI on gestational outcome: a retrospective study

Introduction: Analyse the association between pre-pregnancy BMI and different items of gestational outcome. Materials and methods: A retrospective study of 14'287 patients with singleton pregnancies delivering at a Swiss perinatal centre including 1'046 obese patients with a BMI > 30.0 (8.7%) and 13'241 patients with a BMI up to 29.9 from 2005 to 2015. Women were divided in four groups (underweight, normal weight, overweight and obese) according to WHO obesity classification. Following items were analysed: mode of delivery, gestational age, birth weight and maternal pregnancy complications. Results: Pre-existing…