Clinical recommendation	Evidence rating	References	Comments
Multidetector-row (spiral) CT is the imaging modality of choice to evaluate for PE in pregnancy because, in nonpregnant patients, the diagnostic accuracy is equivalent to pulmonary angiography, and radiation exposure to the fetus is less than with a V/Q scan.	C	Non-pregnancy: 19	Non-pregnancy: clinical guideline19
		Pregnancy: 12, 24, 27	Pregnancy: clinical guideline,12 expert review,24 and prospective cohort study27
LMWHs are recommended for the treatment of acute DVT and PE in pregnancy because of equivalent or superior effectiveness and safety compared with unfractionated heparin.	B	35	Systematic review
LMWHs are the agents of choice for antenatal thromboprophylaxis.	A	35, 42	Systematic review35 and Cochrane review42