title: Preterm delivery--have we been studying the wrong mothers?
mesh_terms: D016241:Child of Impaired Parents / Q000706:statistics & numerical data*; D005260:Female; D012739:Gonadal Steroid Hormones; D006801:Humans; D007752:Obstetric Labor, Premature / Q000453:epidemiology* / Q000209:etiology; D011247:Pregnancy; D012307:Risk Factors
chemical_list: D012739:Gonadal Steroid Hormones