Title to a suspense movie from the 70s or 80s?

I saw this movie as a kid and I can't remember much except the last few scenes where there are two women giving birth at the same time.They both die during childbirth, but one give birth to a boy (whose supposed to be the devils spawn) and the other a girl (who has angelic powers). Then the last scene is the two children several years later and they meet. The boy on one side of the street causes a car to hit a lady (not sure) and the girl (raised by the nuns and leaving what looks like school) see the accident on the other side of the street and heals the lady (or raises her from the dead). That's all I can remember. And I'm only guessing that it was made in the late 70s or 80s. Please help! I been looking for this for years!