First author; Country; Year

Selection

Comparability

Outcome

Total

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