First author; Country; Year	Selection				Comparability		Outcome			Total
First author; Country; Year	Representation of COVID-19 infected pregnant women	Selection of non-COVID-19 exposed pregnant women	Confirmation of COVID-19 infection through nasopharyngeal swab or RT-PCR	Maternal outcomes of interest were not present at the beginning of the study	Adjustments of important risk factors	Adjustments for additional risk factors	Assessment of maternal outcomes	Follow up until end of pregnancy	All patients were followed up adequately
Al-Matary et al.; Saudi Arabia; 2021										7
Angelidou et al.; USA; 2021										8
Gabriel et al.; Spain; 2020										8
Gupta et al.; India; 2021										7
Hcini et al.; France; 2020										9
Khoury et al.; USA; 2020										8
Maraschini et al.; Italy; 2020										7
Norman et al.; Sweden; 2021										9
Oncel et al.; Turkey; 2021										9
Saccone et al.; Multinational; 2021										9
Sánchez-Luna et al.; Spain; 2021										7
Singh et al.; India; 2021										8