title: Temporal and gestational age trends: what is the effect of obstetric intervention?
authors.affiliation: Dr. Caughey is from the Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, Oregon; e-mail: caughey@ohsu.edu.
authors.forename: Aaron B
authors.initials: AB
authors.lastname: Caughey
mesh_terms: D036861:Delivery, Obstetric / Q000706:statistics & numerical data*; D005260:Female; D005865:Gestational Age; D006801:Humans; D009774:Obstetrics / Q000639:trends*; D010818:Practice Patterns, Physicians'; D011247:Pregnancy