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Evaluating cut-off levels for progesterone, β human chorionic gonadotropin and β human chorionic gonadotropin ratio to exclude pregnancy viability in women with a pregnancy of unknown location: A prospective multicenter cohort study.
Bobdiwala S, Kyriacou C, Christodoulou E, Farren J, Mitchell-Jones N, Al-Memar M, Ayim F, Chohan B, Kirk E, Abughazza O, Guruwadahyarhalli B, Guha S, Vathanan V, Gould D, Stalder C, Timmerman D, Van Calster B, Bourne T. Bobdiwala S, et al. Acta Obstet Gynecol Scand. 2022 Jan;101(1):46-55. doi: 10.1111/aogs.14295. Epub 2021 Nov 24. Acta Obstet Gynecol Scand. 2022. PMID: 34817062 Free PMC article.