International guidelines
United Kingdom
Published by:National Institute for Health and Care Excellence
Last published:2021
North America
Published by:American College of Radiology
Last published:2020
Published by:Society of Obstetricians and Gynaecologists of Canada/La Société des obstétriciens et gynécologues du Canada
Last published:2018
Published by:The American College of Obstetricians and Gynecologists
Last published:2012 (re-affirmed 2024)
Asia
Published by:Hong Kong College of Obstetricians and Gynaecologists
Last published:2020
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