title: Editorial: The rhythm theory.
mesh_terms: D001683:Biological Clocks; D002940:Circadian Rhythm; D005260:Female; D013006:Growth Hormone / Q000378:metabolism; D006801:Humans; D008598:Menstruation; D010507:Periodicity; D011388:Prolactin / Q000378:metabolism; D012890:Sleep
chemical_list: D011388:Prolactin; D013006:Growth Hormone