Miha Lucovnik1,2, Isaac Blickstein3, Tomislav Mirkovic4,5, Ivan Verdenik6, Katja Bricelj6, Marijana Vidmar Simic6, Natasa Tul6,4, Andreja Trojner Bregar6,4. 1. Department of Perinatology, Division of Obstetrics and Gynaecology, University Medical Centre Ljubljana, Slajmerjeva 4, 1000, Ljubljana, Slovenia. miha.lucovnik@kclj.si. 2. Medical Faculty, University of Ljubljana, Vrazov trg 2, 1000, Ljubljana, Slovenia. miha.lucovnik@kclj.si. 3. Department of Obstetrics and Gynecology, Kaplan Medical Center, Rehovot, Affiliated with the Hadassah-Hebrew University School of Medicine, Jerusalem, Israel. 4. Medical Faculty, University of Ljubljana, Vrazov trg 2, 1000, Ljubljana, Slovenia. 5. Department of Anesthesiology and Intensive Therapy, University Medical Centre Ljubljana, Zaloska cesta 7, 1000, Ljubljana, Slovenia. 6. Department of Perinatology, Division of Obstetrics and Gynaecology, University Medical Centre Ljubljana, Slajmerjeva 4, 1000, Ljubljana, Slovenia.
Abstract
PURPOSE: To examine the effect of pre-gravid body mass index (BMI) on perinatal outcomes in in vitro fertilization (IVF) singleton pregnancies. METHODS: Retrospective population-based cohort study. All singleton pregnancies delivered at ≥ 22 weeks' in Slovenia between 2002 and 2015 were included. Logistic regression analysis was used to examine the relationship between BMI category and outcomes, controlling for potential confounding variables. Interaction term was included to evaluate whether effects of obesity on perinatal outcomes differ in IVF vs. non-IVF pregnancies. We counted the frequencies of hypertensive disorders of pregnancy, gestational diabetes, cesarean delivery, preterm births, and small as well as large for gestational age neonates, neonatal respiratory distress syndrome, neonatal intraventricular hemorrhage, and perinatal deaths. RESULTS: Pre-gravid overweight and obesity were associated with higher rates of hypertensive disorders, gestational diabetes, and cesarean deliveries in both IVF and non-IVF pregnancies. Pre-gravid underweight was associated with small for gestational age neonates in IVF and non-IVF pregnancies. There was a significantly lower effect of pre-gravid obesity on the incidence of hypertensive disorders (odds ratio (OR) 0.7; 95% confidence interval (CI) 0.5-0.9) and cesarean delivery (OR 0.8; 95% CI 0.7-0.99) in IVF vs. non-IVF pregnancies. The effect of pre-gravid obesity on neonatal mortality was significantly greater in IVF compared to non-IVF pregnancies (OR 4.6; 95% CI 1.4-15.8). CONCLUSIONS: Pre-gravid BMI has an important effect on perinatal outcomes in pregnancies following IVF.
PURPOSE: To examine the effect of pre-gravid body mass index (BMI) on perinatal outcomes in in vitro fertilization (IVF) singleton pregnancies. METHODS: Retrospective population-based cohort study. All singleton pregnancies delivered at ≥ 22 weeks' in Slovenia between 2002 and 2015 were included. Logistic regression analysis was used to examine the relationship between BMI category and outcomes, controlling for potential confounding variables. Interaction term was included to evaluate whether effects of obesity on perinatal outcomes differ in IVF vs. non-IVF pregnancies. We counted the frequencies of hypertensive disorders of pregnancy, gestational diabetes, cesarean delivery, preterm births, and small as well as large for gestational age neonates, neonatal respiratory distress syndrome, neonatal intraventricular hemorrhage, and perinatal deaths. RESULTS: Pre-gravid overweight and obesity were associated with higher rates of hypertensive disorders, gestational diabetes, and cesarean deliveries in both IVF and non-IVF pregnancies. Pre-gravid underweight was associated with small for gestational age neonates in IVF and non-IVF pregnancies. There was a significantly lower effect of pre-gravid obesity on the incidence of hypertensive disorders (odds ratio (OR) 0.7; 95% confidence interval (CI) 0.5-0.9) and cesarean delivery (OR 0.8; 95% CI 0.7-0.99) in IVF vs. non-IVF pregnancies. The effect of pre-gravid obesity on neonatal mortality was significantly greater in IVF compared to non-IVF pregnancies (OR 4.6; 95% CI 1.4-15.8). CONCLUSIONS: Pre-gravid BMI has an important effect on perinatal outcomes in pregnancies following IVF.
Entities:
Keywords:
Body mass index; In vitro fertilization; Maternal and neonatal complications, small for gestational age neonates; Obesity; Overweight; Underweight
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