| No. Abortion ends a pregnancy. Emergency contraception pills (ECPs) cannot end a pregnancy. ECPs work before a pregnancy begins. Pregnancy begins with the implantation of the developing fertilized egg in a woman's uterus.
ECPs can be started within five days of unprotected intercourse. They prevent ovulation — the release of the egg. Or they prevent fertilization — the joining of the sperm and the egg — which usually occurs within six days of intercourse. In theory, it's possible for ECPs to prevent implantation, but implantation doesn't occur until five to seven days after fertilization.
The same is true for the pill, the shot, the patch, and the ring. They also prevent ovulation and fertilization, but not implantation. It is very unlikely that an egg would be released or fertilized while a woman is using them.
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