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Thrombosis and Embolism during Pregnancy and the Puerperium: Acute Management (Green-top Guideline No. 37b)

Published: 13/04/2015

This is the third edition of this guideline. The first edition was published in April 2001 under the same title (numbered Green-top Guideline No. 28) and the second edition was published in February 2007 and reviewed in 2010.


Update August 2018: An addendum has been added to Section 9 Anticoagulant therapy during labour. Read and download the addendum (PDF 343kb)

Update May 2018: New evidence and guidance in this field were reviewed at the May 2018 Guidelines Committee meeting and it was decided that revision of this guideline would be deferred for 1 year (May 2019). The version available on the website and app will remain valid until replaced.

Update February 2017: Following a review of all guidelines in December 2016, some minor editorial changes have been made to this guideline since the original publication. The version available here is the most up to date. The date on the guideline has not been changed since no amendments were made to the content.


The aim of this guideline is to provide information, based on clinical evidence where available, regarding the immediate investigation and management of women in whom venous thromboembolism is suspected during pregnancy or the puerperium.

Thromboprophylaxis during pregnancy and the puerperium is addressed in RCOG Green-top Guideline No. 37a.