title: Elusive denominators and the illusions they create.
authors: Catherine
authors: C
authors: Stevens-Simon
mesh_terms: D000293:Adolescent; D003271:Contraceptive Agents, Female / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D017258:Medroxyprogesterone Acetate / Q000008:administration & dosage; D011247:Pregnancy; D011253:Pregnancy in Adolescence / Q000517:prevention & control* / Q000706:statistics & numerical data
chemical_list: D003271:Contraceptive Agents, Female; D017258:Medroxyprogesterone Acetate