Principally at risk are women who are sexually active early in life, who have multiple male sexual partners, or who are having intercourse with a male partner who has had multiple sexual partners.
Eeskätt on ohustatud naised, kes on seksuaalselt aktiivsed juba varajases elueas, kellel on hulgaliselt seksuaalpartnereid või kes on seksuaalsuhetes mehega, kellel on olnud hulgaliselt seksuaalpartnereid.