Obesity class I and II and IOM 2009 gestational weight gain recommendations 5–9 kg. An audit on 10,000 term singleton deliveries

Abstract

Objectives: To compare several maternal-fetal morbidities comparing the Institute of Medicine IOM 2009 recommendations (IOMR: 5–9 kg in all obese women) between women with adequate gestational weight gain (GWG) and Inadequate (less than 5 kg), and excessive those gaining more than 9 kg among obese women class I (30–34.9 kg/m2) and class II (35–39.9 kg/m2). Study design: South-Reunion University’s maternity (Reunion Island, Indian Ocean). 21-Year-observational cohort study (2001–2021). Epidemiological perinatal database with information on obstetrical and neonatal risk factors. Main outcome measures: Cesarean sections, preeclampsia, means birthweight, rate of small (SGA) or large (LGA) for gestational age newborns and macrosomic babies (≥4 kg). Results: Among the singleton term live births (37 weeks onward) we could define the pre-pregnancy body mass index and GWG in 85.9% of cases. The final study population focused on 10,296 obese women (7138 obesity class I − 30–34.9 kg/m2, 3158 obesity class II–35–39.9 kg/m2). Concerning inadequate GWG (less than 5 kg), respectively for obese I and II, IOMR babies were heavier (plus 90 and 104 g, p