title: The UK Obstetric Surveillance System for rare disorders of pregnancy.
authors.affiliation: National Perinatal Epidemiology Unit, University of Oxford, Old Road Campus, Oxford, UK.
authors.forename: Marian
authors.initials: M
authors.lastname: Knight
authors.forename: Jennifer J
authors.initials: JJ
authors.lastname: Kurinczuk
authors.forename: Derek
authors.initials: D
authors.lastname: Tuffnell
authors.forename: Peter
authors.initials: P
authors.lastname: Brocklehurst
mesh_terms: D003625:Data Collection / Q000379:methods; D005260:Female; D006801:Humans; D011159:Population Surveillance / Q000379:methods*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology*; D035583:Rare Diseases / Q000453:epidemiology*; D006113:United Kingdom / Q000453:epidemiology