Nitrous oxide and the bone-marrow.
D003075:Coitus; D005260:Female; D006657:Histones / Q000032:analysis*; D006801:Humans; D008297:Male; D011479:Protamines / Q000032:analysis*; D012923:Social Class; D013094:Spermatozoa / Q000032:analysis*; D002583:Uterine Cervical Neoplasms / Q000453:epidemiology* / Q000209:etiology
D006657:Histones; D011479:Protamines