title: A comparative study of sleep parameters during pregnancy.
mesh_terms: D000818:Animals; D004562:Electrocardiography; D004569:Electroencephalography; D004576:Electromyography; D005133:Eye Movements; D005260:Female; D012739:Gonadal Steroid Hormones / Q000502:physiology; D006801:Humans; D011247:Pregnancy; D012890:Sleep; D012895:Sleep, REM
chemical_list: D012739:Gonadal Steroid Hormones