On the 41st anniversary of Roe v. Wade, here are six things you probably don’t know about abortion:

1) More than 50 million babies have been aborted in the United States since Roe v. Wade.

2) Legal scholars Left and Right, pro-choice and pro-life, consider the Roe to be a very poorly reasoned decision. For instance, Laurence Tribe wrote: “One of the most curious things about Roe is that, behind its own verbal smokescreen, the substantive judgment on which it rests is nowhere to be found.”

3) Black babies are twice as likely to be aborted as other babies: Black mothers accounted for 29.6 percent of all abortions in 2008, while black women accounted for only 14.4 percent of all women of childbearing age.

4) Every year, more than 15,000 babies are aborted after 20 weeks of gestation (1.5 percent of all abortions times 1.2 million abortions).

5) Babies born before 22 weeks of gestation have survived, including Canadian James Elgin Gill.

6) At 24 weeks' gestation, most babies that are born survive.