Health and Medicine

Drugs and Medicines

How does RU–486 cause an abortion?

A pill containing RU–486 (mifepristone) deprives a fertilized embryo of a compatible uterine environment, terminating a pregnancy within 49 days of fertilization. It was approved for use in the United States on September 28, 2000. It is taken under the supervision of a qualified physician in a clinical setting or physician’s office. Sometimes it is used as an emergency contraceptive (“morning-after pill”) after unprotected sexual intercourse even when more than 49 days have passed since the woman’s last menstrual period.


This is a web preview of the "The Handy Science Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App