RT journal article T1 Pregnancy Outcomes and SARS-CoV-2 Infection: The Spanish Obstetric Emergency Group Study A1 Cruz Melguizo, Sara A1 de la Cruz Conty, María Luisa A1 Carmona Payán, Paola A1 Abascal-Saiz, Alejandra A1 Pintando Recarte, Pilar A1 González Rodríguez, Laura A1 Cuenca Marín, Celia A1 Martínez Varea, Alicia A1 Oreja Cuesta, Ana Belén A1 Prats Rodríguez, Pilar A1 Fernández Buhigas, Irene A1 Rodríguez Gallego, María Victoria A1 Fernández Alonso, Ana María A1 López Pérez, Rocío A1 Broullon Molanes, José Román A1 Encinas Pardilla, María Begoña A1 Ramírez Gómez, Mercedes A1 Gimeno Gimeno, María Joaquina A1 Sánchez Muñoz, Antonio A1 Martínez-Pérez, Oscar A1 Spanish Obstetric Emergency Group (S.O.E.G.) A2 Materno-Infantil y Radiología K1 SARS-CoV-2 K1 coronavirus K1 COVID-19 K1 pregnancy K1 delivery K1 perinatal outcomes K1 premature birth K1 maternal complications AB Pregnant women who are infected with SARS-CoV-2 are at an increased risk of adverse perinatal outcomes. With this study, we aimed to better understand the relationship between maternal infection and perinatal outcomes, especially preterm births, and the underlying medical and interventionist factors. This was a prospective observational study carried out in 78 centers (Spanish Obstetric Emergency Group) with a cohort of 1347 SARS-CoV-2 PCR-positive pregnant women registered consecutively between 26 February and 5 November 2020, and a concurrent sample of PCR-negative mothers. The patients' information was collected from their medical records, and the association of SARS-CoV-2 and perinatal outcomes was evaluated by univariable and multivariate analyses. The data from 1347 SARS-CoV-2-positive pregnancies were compared with those from 1607 SARS-CoV-2-negative pregnancies. Differences were observed between both groups in premature rupture of membranes (15.5% vs. 11.1%, p < 0.001); venous thrombotic events (1.5% vs. 0.2%, p < 0.001); and severe pre-eclampsia incidence (40.6 vs. 15.6%, p = 0.001), which could have been overestimated in the infected cohort due to the shared analytical signs between this hypertensive disorder and COVID-19. In addition, more preterm deliveries were observed in infected patients (11.1% vs. 5.8%, p < 0.001) mainly due to an increase in iatrogenic preterm births. The prematurity in SARS-CoV-2-affected pregnancies results from a predisposition to end the pregnancy because of maternal disease (pneumonia and pre-eclampsia, with or without COVID-19 symptoms). PB MDPI SN 1999-4915 YR 2021 FD 2021-05 LK http://hdl.handle.net/10498/25139 UL http://hdl.handle.net/10498/25139 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 10-nov-2026