Methods
All women were systematically asked for COVID-19 symptoms on admittance to the labour- and pregnancy ward of the AUMC, and were then screened consecutively for SARS-CoV-2 by a PCR on a throat- and/or nasopharyngeal swab [5]. If the PCR result was > 48 hours old, the PCR was repeated. The Medical Ethics committee of the AUMC declared this study exempt from their evaluation (W20_257).