Fig 1.

Study selection process. *Twitter, national reports, blog by J Thornton, ObG Project, COVID-19 and Pregnancy Cases, https://ripe-tomato.org/2020/05/15/covid-19-in-pregnancy-101-onwards/; EPPI-Centre, COVID-19: a living systematic map of evidence, http://eppi.ioe.ac.uk/cms/Projects/DepartmentofHealthandSocialCare/Publishedreviews/COVID-19Livingsystematicmapoftheevidence/tabid/3765/Default.aspx; Norwegian Institute of Public Health, NIPH systematic and living map on COVID-19 evidence, www.nornesk.no/forskningskart/NIPH_mainMap.html; Johns Hopkins University Center for Humanitarian Health; COVID-19, Maternal and Child Health, Nutrition, http://hopkinshumanitarianhealth.org/empower/advocacy/covid-19/covid-19-children-and-nutrition/; ResearchGate, COVID-19 research community, www.researchgate.net/community/COVID-19; and Living Overview of the Evidence, Coronavirus disease (COVID-19), https://app.iloveevidence.com/loves/5e6fdb9669c00e4ac072701d?population=5d062d5fc80dd41e58ba8459