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Introduction: Studies have shown that pregnant women with COVID-19 have a higher risk of intensive care unit admission and invasive mechanical ventilation support than non-pregnant women. Pregnancy-associated physiological changes in respiratory function may contribute to the elevated risk. Alteration in lung volumes and capacities are attributed to the mechanical impediment caused by the growing fetus. Multiple pregnancies may therefore compromise functional lung capacity earlier than singleton pregnancies and contribute to severe respiratory symptoms of COVID-19. Materials and Methods: A total of 5514 women with a symptomatic SARS-CoV-2 infection during pregnancy registered in the COVID-19 Related Obstetric and Neonatal Outcome Study were included. The COVID-19-related adverse maternal outcomes were compared in 165 multiple versus 5349 singleton pregnancies. Combined adverse maternal outcome was defined as presence of COVID-19-related hospitalization and/or pneumonia and/or oxygen administration and/or transfer to ICU and/or death. Multivariate logistic regression was used to estimate the odds ratios and 95% confidence intervals were calculated. Results: The frequency of dyspnea, likelihood of developing dyspnea in a defined pregnancy week and duration of the symptomatic phase of the COVID-19 infection did not differ between the two groups. On average, COVID-19-related combined adverse outcome occurred earlier during pregnancy in women expecting more than one child than in singleton pregnancies. The overall incidence of singular and combined COVID-19-associated adverse maternal outcomes was not significantly different between groups. However, regression analysis revealed that multiple gestation, preconceptional BMI > 30 kg/m 2 and gestational age correlated significantly with an increased risk of combined adverse maternal outcome. Conversely, maternal age and medically assisted reproduction were not significant risk factors for combined adverse maternal outcome. Conclusion: Our data show that multiple gestation alone is a risk factor for COVID-19-associated combined adverse maternal outcome. Moreover, severe courses of COVID-19 in women expecting more than one child are observed earlier in pregnancy than in singleton pregnancies.
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[This corrects the article DOI: 10.1055/a-2196-6224.].
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AIMS: To evaluate the intra-operator reliability of tissue Doppler imaging-based quantitative cervical elastography in at-term pregnancies. METHODS: Three series of two cycles of manual gentle compression-relaxation of the cervix were performed by one gynecologist in 11 consecutive at-term pregnancies through the vaginal probe. The compression movements should be sufficient to obtain the maximal compression of the anterior portion of the cervical tissue, until the posterior portion begins to be dislocated. Strain values were assessed on the entire thickness of the anterior cervical lip. The influence of strain type (Lagrangian vs. natural) and the extent of compression exerted (difference among the two cycles of compression-relaxation) were evaluated. RESULTS: Strain measurement was influenced by the extent of compression, as well as by the strain type. The strain measured during the cycle with larger cervical compression, using the natural strain preset, showed a superior reliability [mean strain among patients: 0.68±0.18; mean of differences among three measures: 0.07±0.06; intraclass correlation coefficient (ICC) consistency: 0.90]. The strain measured using the Lagrangian strain preset showed overall a low reliability (ICC consistency: 0.04). CONCLUSIONS: Quantitative cervical elastography performed in at-term pregnancies, under standardized conditions, has a high reliability.
