Body Mass Index at 11–13 Weeks’ Gestation and Pregnancy Complications

• Published in: Fetal diagnosis and therapy Vol. 30; no. 4; pp. 250 - 265
• Main Authors: Syngelaki, Argyro, Bredaki, Foteini E., Vaikousi, Eirini, Maiz, Nerea, Nicolaides, Kypros H.
• Format: Journal Article
• Language: English
• Published: Basel, Switzerland Karger 01.01.2011; S. Karger AG
• Subjects: Adult; Biological and medical sciences; Body Mass Index; Delivery. Postpartum. Lactation; Diseases of mother, fetus and pregnancy; Female; General aspects; Gestational Age; Gynecology. Andrology. Obstetrics; Humans; Logistic Models; Medical sciences; Obesity - complications; Original Paper; Overweight - complications; Pregnancy; Pregnancy Complications - etiology; Pregnancy Outcome; Pregnancy Trimester, First; Pregnancy. Fetus. Placenta; Prospective Studies; Risk Factors; Body mass index; First-trimester screening; Preterm delivery; Preeclampsia; Diabetes mellitus, gestational; Stillbirth; Birth weight; Miscarriage; Cesarean section; Endocrinopathy; Stillborn; Pregnancy disorders; Neonatology; Abortion; Death in utero; Surgery; Complication; Diabetes mellitus; Premature delivery; First trimester; Medical screening; Pregnancy toxemia; gestational; Pregnancy; Medicine; Treatment
• ISSN: 1015-3837; 1421-9964
• DOI: 10.1159/000328083

Objective: To examine the association between body mass index (BMI) at 11–13 weeks’ gestation and a wide range of adverse pregnancy outcomes after adjustment for confounding factors in obstetric history and maternal characteristics. Methods: This was a prospective screening study for adverse obstetric outcomes in women with singleton pregnancies attending for their first routine hospital visit at 11 +0 –13 +6 weeks of gestation. The maternal weight and height were measured and the BMI was calculated. Regression analysis was performed to examine the association between BMI and each of the adverse pregnancy outcomes. Results: We examined 41,577 pregnancies with a live fetus at 11–13 weeks. There was a significant contribution from maternal BMI, in addition to maternal characteristics and obstetric history, in the prediction of subsequent miscarriage, stillbirth, preeclampsia, gestational hypertension, gestational diabetes mellitus, delivery of small and large for gestational age neonates, and both elective and emergency cesarean section, but not spontaneous preterm delivery. The risk for each pregnancy complication increased exponentially with BMI, except for delivery of small for gestational age neonates which decreased with BMI. Conclusions: Maternal BMI at 11–13 weeks can be combined with other maternal characteristics and obstetric history to estimate patient-specific risks for many pregnancy complications.