Pregnancy of unknown location: A consensus statement of nomenclature, definitions, and outcome

Kurt Barnhart^*, Norah M. Van Mello, Tom Bourne, Emma Kirk, Ben Van Calster, Cecilia Bottomley, Karine Chung, George Condous, Steven Goldstein, Petra J. Hajenius, Ben Willem Mol, Thomas Molinaro, Katherine L. O'Flynn O'Brien, Richard Husicka, Mary Sammel, Dirk Timmerman

^*Corresponding author for this work