Rape is a type of sexual assault usually involving sexual intercourse, which is initiated by one or more persons against another person without that person's consent. The act may be carried out by physical force, coercion, abuse of authority or with a person who is incapable of valid consent, such as one who is unconscious, incapacitated, or below the legal age of consent. The term is most often defined in criminal law.
Internationally, the incidence of rapes recorded by the police during 2008 varied between 0.1 in Egypt per 100,000 people and 91.6 per 100,000 people in Lesotho with 4.9 per 100,000 people in Lithuania as the median. According to the American Medical Association (1995), sexual violence, and rape in particular, is considered the most underreported violent crime. The rate of reporting, prosecution and convictions for rape varies considerably in different jurisdictions. The U.S. Bureau of Justice Statistics (1999) estimated that 91% of U.S. rape victims are female and 9% are male, with 99% of the offenders being male. Rape by strangers is usually less common than rape by persons the victim knows, and several studies argue that male-male and female-female prison rape are quite common and may be the least reported forms of rape.
When part of a widespread and systematic practice, rape and sexual slavery are recognized as crimes against humanity and war crimes. Rape is also recognized as an element of the crime of genocide when committed with the intent to destroy, in whole or in part, a targeted ethnic group.
Victims of rape can be severely traumatized and may suffer from posttraumatic stress disorder; in addition to psychological harm resulting from the act, rape may cause physical injury, or have additional effects on the victim, such as acquiring of a sexually transmitted infection or becoming pregnant. Furthermore, following a rape, a victim may face violence or threats of thereof from the rapist, and, in some cultures, from the victim's own family and relatives.