title: Letter: Endometriosis and pseudopregnancy.
mesh_terms: D000328:Adult; D001835:Body Weight; D004715:Endometriosis / Q000188:drug therapy*; D004997:Ethinyl Estradiol / Q000627:therapeutic use; D005260:Female; D006801:Humans; D009325:Nausea / Q000150:complications; D009640:Norethindrone / Q000627:therapeutic use; D011247:Pregnancy; D011555:Pseudopregnancy
chemical_list: D004997:Ethinyl Estradiol; D009640:Norethindrone