As the Supreme Court considers Roe v. Wade, a look at how abortion became legal

For nearly a half century abortion has been a constitutional right in the United States. But this week the U.S. Supreme Court hears arguments in a Mississippi case that directly challenges Roe v. Wade and subsequent decisions.

Those rulings consistently declared that a woman has a constitutional right to terminate a pregnancy in the first two trimesters of pregnancy when a fetus is unable to survive outside the womb. But with the abortion right now in doubt, it's worth looking back at its history.

Abortion did not become illegal in most states until the mid to late 1800s. But by the 1960s, abortion, like childbirth, had become a safe procedure when performed by a doctor, and women were entering the workforce in ever