“…The most important of these are factors related to sexual behaviour and elevated risks have been associated with multiple sexual partners and having been divorced (Boyd & Doll, 1964;Martin, 1967;Harris et al, 1980;Rawls et al, 1986;Brinton et al, 1987), early age at first intercourse (Wynder et al, 1954;Rotkin, 1973;La Vecchia et al, 1986), marriage (Martin, 1967;Rotkin, 1967) or first childbirth (Boyd & Doll, 1964;Harris et al, 1980) and high parity (Jussawalla et al, 1971;Brinton et al, 1987). These observations all point to the existence of a venereally transmitted causative agent (Beral, 1974) and there is now much evidence to indicate that certain types of the human papilloma virus (HPV) have a central role in this process.…”