Women are more likely to be victimized by someone that they are intimate with, commonly called "intimate partner violence" (IPV). Instances of IPV tend not to be reported to police and thus many experts find it hard to estimate the true magnitude of the problem. Though this form of violence is often considered as an issue within the context of heterosexual relationships, it also occurs in lesbian relationships, daughter-mother relationships, roommate relationships and other domestic relationships involving two women. Violence against women in lesbian relationships is about as common as violence against women in heterosexual relationships.