title: Letter: Heterosexual parabiosis.
mesh_terms: D000818:Animals; D005260:Female; D012739:Gonadal Steroid Hormones / Q000494:pharmacology; D008297:Male; D010227:Parabiosis; D011247:Pregnancy; D016038:Skin Transplantation; D014181:Transplantation Immunology / Q000187:drug effects; D014184:Transplantation, Homologous
chemical_list: D012739:Gonadal Steroid Hormones