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COVID-19 in pregnancy: prevalence, management, and outcomes in a single large health system.

OBJECTIVE: This study assessed the prevalence of SARS-CoV-2 positivity in a cohort of pregnant patients served by a single health system. Treatments and outcomes are compared by maternal SARS-CoV-2 status and COVID-19 symptomatology.

METHODS: This was a retrospective cohort study of patients with delivery outcomes from March 2020-December 2021. SARS-CoV-2 positivity was defined by patients who had a positive test or COVID-19 diagnosis during pregnancy. Descriptive analysis compared demographics, medical management during pregnancy, and both perinatal and non-obstetric outcomes by SARS-CoV-2/COVID-19 status (negative, positive-asymptomatic, and positive-symptomatic).

RESULTS: Of 24,310 pregnancies, 94.6% were negative, 3.9% were positive-asymptomatic, and 1.5% were positive-symptomatic. Non-delivery hospitalizations were highest among positive-symptomatic patients (16.8%), followed by positive-asymptomatic patients (3.9%) and lastly negative patients (2.7%) ( p  < 0.001). Likewise, Intensive Care Unit (ICU) admissions during an antepartum or delivery admission were higher for positive-symptomatic patients (13.0%) compared to positive-asymptomatic patients or negative patients (0.7% and 0.5%, respectively, p  < 0.001). The rate of preterm birth was significantly higher in positive-symptomatic patients compared to positive-asymptomatic and negative patients (15.7% vs. 9.5% and 9.8%, respectively, p  = 0.002). There were no statistically significant differences in rates of miscarriage or intrauterine fetal demise. Maternal readmission, administration of corticosteroids for fetal lung maturity, birthweight, and neonatal intensive care unit (NICU) admission were significantly affected by SARS-CoV-2 status.

CONCLUSION: Pregnant patients testing positive for SARS-CoV-2 were mostly asymptomatic and identified during routine screening. Symptomatic patients were significantly more likely to require hospitalization and ICU admission with some increase in adverse perinatal outcomes.

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