The Cochrane database of systematic reviewsReferencesReferences to studies included in this reviewChima 2021 {published data only}10.1542/hpeds.2021-005866Costeira 2021 {published data only}10.1371/journal.pone.0257051Hameed 2021 {published data only}10.1159/000516641Mujumdar 2020 {published data only}10.1016/j.fertnstert.2020.09.060Seeland 2020 {published data only}10.1186/s12916-020-01851-zReferences to studies excluded from this reviewAlyousefi 2021 {published data only}10.1186/s12905-021-01456-5Badrawi 2021 {published data only}10.1016/j.radcr.2021.08.024Cagnacci 2022 {published data only}10.1016/j.crwh.2022.e00389Ding 2021 {published data only}10.1093/cid/ciaa1022Fernández‐Capitán 2021 {published data only}10.1055/s-0040-1718402Fiorini 2021 {published data only}10.1093/ehjcr/ytaa563Grimes 2021 {published data only}10.1002/ana.26180Iguina 2020 {published data only}10.1016/j.chest.2020.08.723Koritala 2021 {published data only}10.2214/AJR.21.25559Kow 2021 {published data only}10.1080/13625187.2020.1849618Kundal 2021 {published data only}10.1002/ccr3.3527Kurdoğlu 2021 {published data only}10.15296/ijwhr.2021.15Lee 2020 {published data only}10.1097/GME.0000000000001657Lete 2021 {published data only}10.1080/13625187.2020.1867845Limanova 2021 {published data only}10.20953/1729-9225-2021-1-149-158Mitra 2021 {published data only}10.1136/bmjsrh-2021-201219NCT04865029 {published data only}NCT04865029Ostovan 2021 {published data only}10.1007/s00415-021-10450-8Pires 2020 {published data only}10.1590/1806-9282.66.S2.22Ramírez 2020 {published data only}10.1016/j.maturitas.2020.05.021Rebelo 2021 {published data only}10.1080/2331205X.2021.2002558Riera‐Mestre 2021 {published data only}10.3390/v13112128Spratt 2020 {published data only}10.1210/endocr/bqaa121Traish 2021 {published data only}10.1016/j.tem.2021.04.006Vahey 2021 {published data only}10.1371/journal.pone.0256917Valenzuela‐Vallejo 2021 {published data only}10.3390/clinpract11040105Additional referencesAbou‐Ismail 2020Ahmed 2020Benson 2020Bikdeli 2020CNGOF 2020Covidence 2022 [Computer program]Curtis 2016de Bastos 2014Deeks 2020Ding 2021Dragoman 2018Egger 1997Fruzzetti 2020FSRH 2020GRADEpro GDT 2021 [Computer program]Higgins 2020Jin 2020Liberati 2009Mauvais‐Jarvis 2020Office for National Statistics 2020Ramírez 2020Reeves 2022Robinson 1991Schünemann 2020Stelzig 2020Sterne 2019Sterne 2020Sund 2022Tepper 2016UN 2019WHO 2020Zhang 2020References to other published versions of this reviewCohen 2021. 1