title: Cut-off level--what do you want it to be?
authors.forename: B W
authors.initials: BW
authors.lastname: Mol
authors.forename: P J
authors.initials: PJ
authors.lastname: Hajenius
authors.forename: W M
authors.initials: WM
authors.lastname: Ankum
authors.forename: F
authors.initials: F
authors.lastname: van der Veen
authors.forename: P M
authors.initials: PM
authors.lastname: Bossuyt
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000097:blood / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011374:Progesterone / Q000097:blood*; D014463:Ultrasonography
chemical_list: D011374:Progesterone