1646-5830 1646-5830 S1646-58302021000400381 Portugal Portugal 30 12 2021 30 12 2021 15 4 381 383

1 who.int 2020 2 Wu Z and McGoogan J M 2020 323 1239-42 3 acog 2020 4 2020 69 769-75 5 2020 55 586-92 6 D'Antonio F 2020 2 100107 7 2020 92 1902-14 8 Algharably E A H.Azizi M.Dobrowolski P.Guzik T.Persu A.Prejbisz A.Riemer T G.Wang J G.Burnier M 2020 116 1688-99 9 2020 35 288-301 10 American College of Obstetricians and Gynecologists 2013 11 2020 127 1374-80 12 and Goldstein J A 2020 154 23-32