title: Low-dose progestogens and ectopic pregnancy.
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000139:chemically induced*; D045167:Progesterone Congeners / Q000008:administration & dosage / Q000009:adverse effects*; D012306:Risk
chemical_list: D045167:Progesterone Congeners