Obstetric morbidity in gestational carrier pregnancies: a population-based study
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Obstetric morbidity in gestational carrier pregnancies: a population-based study Kate Swanson 1,2
&
Joseph M. Letourneau 3
&
Miriam Kuppermann 1,4 & Brett D. Einerson 5
Received: 21 September 2020 / Accepted: 29 October 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Purpose We sought to characterize severe obstetric morbidity among women who are gestational carriers compared to other patients. Methods This was a population-based study comparing gestational carrier pregnancies to non-surrogate pregnancies (nonsurrogate IVF pregnancies, all non-gestational carrier pregnancies, and a cohort of matched controls) delivering in Utah between 2009 and 2018, using birth certificate data. Our primary outcome was a composite of severe morbidity, including death, ICU admission, eclampsia, HELLP syndrome, transfusion, and unplanned hysterectomy. Our secondary outcomes were cesarean delivery (CD) and hypertensive disorders of pregnancy. Results During the study period, 361 gestational carrier pregnancies and 509,015 other pregnancies resulted in live births. Severe morbidity was less common among gestational carrier pregnancies than IVF pregnancies (1.7% versus 5.5%, odds ratio [OR] 0.29, 95% confidence interval [CI] 0.12–0.70), but was not different when compared to all other pregnancies (1.0%, OR 1.61, 95% CI 0.72–3.60), or a cohort of matched controls (1.0%, OR 1.37, 95% CI 0.55–3.40). CD was less common among gestational carrier pregnancies than IVF pregnancies, but not different than all other pregnancies or matched controls. While frequency of hypertensive disorders of pregnancy was lower among gestational carrier pregnancies than IVF pregnancies, it was higher than all other women who delivered and comparable to matched controls. Conclusion Severe obstetric morbidity is uncommon among gestational carrier pregnancies. Women who are gestational carriers are at lower risk of morbidity and CD than others who conceive through IVF and do not appear to be at increased risk compared to matched controls. Keywords Gestational surrogacy . Gestational carrier pregnancies . Severe obstetric morbidity . IVF
* Kate Swanson [email protected] 1
Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology & Reproductive Sciences, University of California San Francisco, 550 16th St, San Francisco, CA 94158, USA
2
Division of Medical Genetics, Department of Pediatrics, University of California San Francisco, 550 16th St, San Francisco, CA 94158, USA
3
University of Utah Center for Reproductive Medicine, 675 Arapeen Way, Salt Lake City, UT 84108, USA
4
Department of Epidemiology & Biostatistics, University of California, San Francisco, 550 16th St, San Francisco, CA 94158, USA
5
Division of Maternal-Fetal Medicine, Department of Obstetrics & Gynecology, University of Utah Health, 50 N Medical Dr, Salt Lake City, UT 84132, USA
Introduction Gestational carrier pregnancies, wherein intended parents or a single intended parent contract w
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