title: Gravitational separation of X and Y spermatozoa.
mesh_terms: D000818:Animals; D002417:Cattle; D002465:Cell Movement; D003582:Cytogenetics; D006112:Gravitation; D006801:Humans; D008297:Male; D008433:Mathematics; D012730:Sex Chromosomes; D012732:Sex Determination Analysis; D013094:Spermatozoa / Q000502:physiology; D013997:Time Factors