Maternal and Neonatal Outcomes in Multi-Ethnic Populations with High Booking BMI

November 15, 2026 Dr. Michael Lee – Health Editor Health

High booking body mass index creates steep obstetric and neonatal risks in multi-ethnic populations, according to a retrospective study published in Cureus.

Key Clinical Takeaways:

  • Women with a booking BMI of 50 kg/m² or higher faced the highest rates of gestational diabetes, pre-eclampsia, and caesarean delivery.
  • Gestational diabetes occurred most frequently among South Asian, Asian, Middle Eastern, and Black African-Caribbean patients in the 124-patient cohort.
  • Researchers recorded no venous thromboembolism events across the study population, though larger investigations remain necessary to evaluate rare complications.

Maternity Outcomes at Luton and Dunstable Hospital

Medical teams evaluated 124 maternal records from deliveries managed between January 2025 and June 2026 at Luton and Dunstable Hospital, Cureus reported. Investigators structured the retrospective review around four distinct booking body mass index categories to compare outcomes across patient groups. Thirty-one women represented each category, spanning normal weight up to severe obesity at 50 kg/m² and above.

Patients with a booking BMI of 50 kg/m² or greater experienced a 32.3 percent rate of gestational diabetes mellitus. Pre-eclampsia affected 19.3 percent of patients in the highest BMI bracket, while chronic hypertension appeared in 12.9 percent of that same cohort. By comparison, patients in the normal weight category recorded a 9.7 percent rate of gestational diabetes and a 6.5 percent incidence of pre-eclampsia.

Ethnic Groups Face Different Cardiometabolic Risks

Cardiometabolic risks differed between ethnic groups in the multi-ethnic maternity population. South Asian, Asian, and Middle Eastern women registered a 28.6 percent rate of gestational diabetes. Black and Black African-Caribbean women experienced a 26.7 percent rate for gestational diabetes alongside a 20 percent incidence of pre-eclampsia.

National Institute for Health and Care Excellence guidelines recommend lower BMI thresholds for specific ethnic populations due to earlier cardiometabolic risks. Of the 26 total gestational diabetes cases identified in the study, 23 occurred within the high BMI groups. Six of the ten total pre-eclampsia cases concentrated within the cohort of women with a booking BMI of 50 kg/m² or higher.

High BMI Increases Caesarean Births and Complications

Caesarean births occurred frequently across all evaluated weight categories in the hospital audit. Patients with a booking BMI of 50 kg/m² or greater underwent caesarean delivery in 67.7 percent of cases. Elective procedures contributed substantially to operative deliveries in the highest weight brackets, whereas emergency procedures occurred more often in moderate obesity groups.

Postpartum haemorrhage exceeding 500 millilitres affected 61.2 percent of patients in the highest BMI cohort. Wound infections developed in 9.7 percent of patients with a BMI of 50 kg/m² or greater, and neonatal unit admissions reached 19.4 percent for that group. Clinical indicators prompting caesarean sections included previous uterine scars, failed labour inductions, fetal heart rate concerns, and malpresentation.

Disclaimer: The information provided in this article is for educational and scientific communication purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider regarding any medical condition, diagnosis, or treatment plan.

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