| Chen et al. 2020 (China) [18] | Retrospective Study | Nine pregnant women in the third trimester of pregnancy and their neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Chen S. et al. 2020 (China) [19] | Case report | Five pregnant women and their neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Zhu et al. 2020 (China) [20] | Retrospective Study | Nine women and ten neonates (one twin pregnancy) | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Ferrazzi et al. 2020 (Italy) [23] | Retrospective Study | 42 women with COVID-19 and their neonates | Positive COVID-19 test | Among the 42 births, three infants tested positive for COVID-19 post-delivery on days one and three, respectively |
| Liao et al. 2020 (China) [22] | Retrospective Study | Ten women, positive for COVID-19, and ten neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Liu et al. 2020 (China) [23] | Retrospective Study | 51 women and 51 neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Nie et al. 2020 (China) [26] | Retrospective Study | 33 women and 28 neonates | Positive COVID-19 test | Only a neonate was found to have SARS-CoV-2 infection |
| Pereira et al. 2020 (Spain) [27] | Cohort study | 60 women and their neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Qiancheng et al 2020 (China) [29] | Retrospective Study | 82 women and their neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Rosen et al. 2021 (Israel) [30] | Cohort study | 55 women and their neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Wang et al. 2020 (China) [29] | Case study | A woman and her neonate | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Yan et al. 2020 (China) [32] | Retrospective Study | 116 women and 86 neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Breslin et al. 2020 (USA) [33] | Retrospective Study | 43 Women and their neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Yang et al. 2020 (China) [32] | Retrospective Study | Seven women and their neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Yang et al. 2020 (China) [33] | Retrospective Study | 24 women and their neonates | Positive COVID-19 test | There was no indication of vertical transmission of COVID-19 to the neonates |
| Chen Y. et al. 2020 (China) [34] | Case study | Four women and their neonates | Positive COVID-19 Test | There was no indication of vertical transmission of COVID-19 to the neonates |
