Rape is a medical emergency. People who are raped may be injured or have a sexually transmitted disease (STD). People may not know they are hurt or sick. Doctors can give medicine to treat an STD. HIV, an STD, can be prevented by early treatment. If seen quickly, a doctor can give medication called emergency contraception to prevent pregnancy. Rape is at least twice as likely to cause pregnancy as consensual sex. The reason for this is not known.