NOW affirms that reproductive rights are issues of life and death for women, not mere matters of choice. NOW fully supports access to safe and legal abortion, to effective birth control and emergency contraception, to reproductive health services and education for all women. We oppose attempts to restrict these rights through legislation, regulation or Constitutional amendment.
Center for Reproductive Rights
Latina Institute for Reproductive Health
Not-2-late.com—a resource for emergency contraception
If taken within 72 hours after unprotected sexual intercourse, certain brands of oral contraceptives can be used as emergency contraception to prevent pregnancy. For exact doses of different pills: http://ec.princeton.edu/questions/dose.html