title: Obstetric intervention and benefit in conditions of very low prevalence.
authors.forename: P F
authors.initials: PF
authors.lastname: Chien
authors.forename: K S
authors.initials: KS
authors.lastname: Khan
mesh_terms: D005260:Female; D006801:Humans; D011237:Predictive Value of Tests; D011247:Pregnancy; D011248:Pregnancy Complications / Q000628:therapy*; D011379:Prognosis