The incidence and impact of increased body mass index on maternal and fetal morbidity in the low-risk primigravid population

Department of Obstetrics and Gynaecology, Rotunda Hospital, Dublin, Ireland.
Journal of Maternal-Fetal and Neonatal Medicine (Impact Factor: 1.37). 12/2007; 20(12):879-83. DOI: 10.1080/14767050701713090
Source: PubMed


To determine the incidence and impact of increased body mass index (BMI) on maternal and fetal morbidity in the low-risk primigravid population.
This was a prospective study with retrospective analysis of delivery outcome data. All low-risk primigravida who met the inclusion criteria during the recruitment period were approached. BMI was calculated using the formula weight/height squared. The participants were divided into five categories: 'underweight' (BMI <20 kg/m2), 'normal' (BMI 20.01-25 kg/m2), 'overweight' (BMI 25.01-30 kg/m2), 'obese' (BMI 30.01-40 kg/m2), and 'morbidly obese' (BMI >40 kg/m2). Maternal outcomes evaluated included gestation at delivery, onset of labor (spontaneous/induced/elective cesarean section), length of labor, use of oxytocin and epidural, mode of delivery, and estimated blood loss. Perinatal outcome measures included infant birth weight (kg) and centile, gestational age, ponderal index, Apgar score <7 at 5 minutes, cord pH <7.1, presence of meconium grade 3 at delivery, degree of resuscitation required, admission to neonatal intensive care unit (NICU), and duration of stay.
One thousand and eleven women participated in the study. Complete outcome data were available for 833 women (82%). A significant difference was identified in gestation at delivery between the subgroups (p < 0.004). A significant positive correlation was identified between cesarean section rates with increasing BMI, even when gestation was controlled for (p = 0.004). Similarly, women in the normal BMI group remained significantly less likely to have an infant requiring NICU admission than obese women (2.2% vs. 8.6%; p = 0.011).
High BMI is associated with longer gestations, higher operative delivery rates, and an increased rate of neonatal intensive care admission

9 Reads
  • [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to analyse the occurrence of neonatal early onset group B streptococcal (EOGBS) disease relative to maternal body mass index (BMI). A cohort of Swedish parturients with an early pregnancy BMI registered was investigated. Data were retrieved from population-based registers during 1997-2001, (n = 344 127, elective caesarean section excluded). Medical records of all infants with a diagnosis of EOGBS septicaemia (P36.0) were scrutinized for verification of the diagnosis. There were 136 cases with blood culture-positive septicaemia and 112 cases with clinical infection. Odds ratios (OR) and 95% confidence intervals (CI) were calculated using multiple logistic regression. In obese parturients with BMI > 30, there was an 80% increased risk for verified neonatal EOGBS disease (OR 1.8, 95% CI 1.1-3.0). When cases with clinical sepsis were included a significant risk increment was also found in overweight women with BMI 25.0-29.9 (OR 1.5, 95% CI 1.1-2.0). Maternal obesity and overweight are risk factors associated with increased risk of neonatal EOGBS disease.
    Acta Paediatrica 10/2008; 97(10):1386-9. DOI:10.1111/j.1651-2227.2008.00940.x · 1.67 Impact Factor
  • Source

    International journal of obstetric anesthesia 10/2009; 18(4):368-72. DOI:10.1016/j.ijoa.2009.04.009 · 1.60 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Obstetrical risk is increased with maternal obesity. This prospective study was designed to simultaneously evaluate the outcomes in obese parturients and their newborns. Patients with a body mass index (BMI) > or =35 were prospectively identified and compared to an equal number of normal weight parturients. Maternal and neonatal outcome measures were compared for the peripartum and neonatal period. We identified 580 obese parturients over a 6 month period and compared them to an equal number of normal weight parturients. The incidence of obesity in this population was 23%. Obesity was associated with increased rates of hypertension, diabetes, and cesarean section. Obese patients were more likely to develop postpartum complications. Neonatal outcomes were compared for infants > or =37 weeks gestation excluding multiple births (496 neonates in the obese group and 520 in the control group). The neonates of obese parturients were more likely to be macrosomic, have 1-minute Apgar scores of < or =7.0 and require admission to a special care unit. Sub-group analysis showed that negative outcomes for parturients and their neonates correlated with increasing BMI. Neonates born to obese diabetic parturients had the highest risk of poor outcomes. Maternal obesity confers increased risks for both the parturient and their newborn.
    The journal of maternal-fetal & neonatal medicine: the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians 11/2009; 23(8):906-13. DOI:10.3109/14767050903338472 · 1.37 Impact Factor
Show more