The rate of SARS-CoV-2 positivity in asymptomatic pregnant women admitted to hospital for delivery: Experience of a pandemic center in Turkey.

To investigate the rate of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) positivity in asymptomatic pregnant women admitted to hospital for delivery in a Turkish pandemic center. This prospective cohort study was conducted in Ankara City Hospital between April, 15, 2020 and June, 5, 2020. A total of 206 asymptomatic pregnant women (103 low-risk pregnant women without any defined risk factor and 103 high-risk pregnant women) were screened for SARS-CoV-2 positivity upon admission to hospital for delivery. Detection of SARS-CoV2 in nasopharyngeal and oropharyngeal samples was performed by Real Time Reverse Transcriptase Polymerase Chain Reaction (RT-PCR) method targeting RdRp (RNA dependent RNA polymerase) gene. Two groups were compared in terms of demographic features, clinical characteristics and SARS-CoV-2 positivity. Three of the 206 pregnant women participating in the study had positive RT-PCR tests (1.4 %) and all positive cases were in the high-risk pregnancy group. Although, one case in the high-risk pregnancy group had developed symptoms highly suspicious for COVID-19, two repeated RT-PCR tests were negative. SARS-CoV-2 RT-PCR positivity rate was significantly higher in the high-risk pregnancy group (2.9 % vs 0%, p = 0.04). Healthcare professionals should be cautious in the labor and delivery of high-risk pregnant women during the pandemic period and universal testing for COVID-19 may be considered in selected populations.

Tanacan A ，Erol SA ，Turgay B ，Anuk AT ，Secen EI ，Yegin GF ，Ozyer S ，Kirca F ，Dinc B ，Unlu S ，Yapar Eyi EG ，Keskin HL ，Sahin D ，Surel AA ，Tekin OM ... -  《-》

Outcomes of universal SARS-CoV-2 testing program in pregnant women admitted to hospital and the adjuvant role of lung ultrasound in screening: a prospective cohort study.

Yassa M ，Yirmibes C ，Cavusoglu G ，Eksi H ，Dogu C ，Usta C ，Mutlu M ，Birol P ，Gulumser C ，Tug N ... -  《-》

Universal screening for SARS-CoV-2 before labor admission during Covid-19 pandemic in Madrid.

Herraiz I ，Folgueira D ，Villalaín C ，Forcén L ，Delgado R ，Galindo A ... -  《-》

Post lockdown COVID-19 seroprevalence and circulation at the time of delivery, France.

Mattern J ，Vauloup-Fellous C ，Zakaria H ，Benachi A ，Carrara J ，Letourneau A ，Bourgeois-Nicolaos N ，De Luca D ，Doucet-Populaire F ，Vivanti AJ ... -  《PLoS One》

Pregnancy and postpartum outcomes in a universally tested population for SARS-CoV-2 in New York City: a prospective cohort study.

To describe differences in outcomes between pregnant women with and without coronavirus dsease 2019 (COVID-19). Prospective cohort study of pregnant women consecutively admitted for delivery, and universally tested via nasopharyngeal (NP) swab for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) using reverse transcription-polymerase chain reaction. All infants of mothers with COVID-19 underwent SARS-CoV-2 testing. Three New York City hospitals. Pregnant women >20 weeks of gestation admitted for delivery. Data were stratified by SARS-CoV-2 result and symptomatic status, and were summarised using parametric and nonparametric tests. Prevalence and outcomes of maternal COVID-19, obstetric outcomes, neonatal SARS-CoV-2, placental pathology. Of 675 women admitted for delivery, 10.4% were positive for SARS-CoV-2, of whom 78.6% were asymptomatic. We observed differences in sociodemographics and comorbidities among women with symptomatic COVID-10 versus asymptomatic COVID-19 versus no COVID-19. Caesarean delivery rates were 46.7% in symptomatic COVID-19, 45.5% in asymptomatic COVID-19 and 30.9% in women without COVID-19 (P = 0.044). Postpartum complications (fever, hypoxia, readmission) occurred in 12.9% of women with COVID-19 versus 4.5% of women without COVID-19 (P < 0.001). No woman required mechanical ventilation, and no maternal deaths occurred. Among 71 infants tested, none were positive for SARS-CoV-2. Placental pathology demonstrated increased frequency of fetal vascular malperfusion, indicative of thrombi in fetal vessels, in women with COVID-19 versus women without COVID-19 (48.3% versus 11.3%, P < 0.001). Among pregnant women with COVID-19 at delivery, we observed increased caesarean delivery rates and increased frequency of maternal complications in the postpartum period. Additionally, intraplacental thrombi may have maternal and fetal implications for COVID-19 remote from delivery. COVID-19 at delivery: more caesarean deliveries, postpartum complications and intraplacental thrombi.

Prabhu M ，Cagino K ，Matthews KC ，Friedlander RL ，Glynn SM ，Kubiak JM ，Yang YJ ，Zhao Z ，Baergen RN ，DiPace JI ，Razavi AS ，Skupski DW ，Snyder JR ，Singh HK ，Kalish RB ，Oxford CM ，Riley LE ... -  《-》