Medical Students for Choice, based in Philadelphia, is a group formed by medical students in 1993 to make sure abortion procedures are taught in medical school.

Jon O’Brien is president of Catholics for Choice, which believes that the individual conscience should be the keystone for moral decision-making on reproductive rights matters and that affordable contraception should be available to all.

Planned Parenthood Federation of America fights against legislation that limits access to abortions. Contact the media office.

Debra Ness is president of the National Partnership for Women and Families, a nonprofit, nonpartisan organization in Washington D.C., that works to promote quality health care for women, including access to abortion. Contact communications assistant Cindy Romero.

Alexander C. Sanger, grandson of reproductive rights activist Margaret Sanger, is chairman of the International Planned Parenthood Federation. He wrote Beyond Choice: Reproductive Freedom in the 21st Century (Public Affairs, 2004).

The Rev. Paul T. Stallsworth is president of the Taskforce of United Methodists on Abortion and Sexuality and the editor of its magazine, Lifewatch. He lives in Whiteville, N.C.

Allan Sawyer is president of the American Association of Pro Life Obstetricians and Gynecologists, headquartered in Holland, Mich.

Judie Brown is president and co-founder of the Catholic American Life League in Virginia, which promotes anti-abortion legislation. Contact Paul Rondeau.

Troy Newman is president of Operation Rescue. The organization is known for buying and subsequently closing an abortion clinic in Wichita, Kan., and it now uses the building as its headquarters.