Twilight (novel series)
Later, Bella's placenta detaches in an accident, and the Cullens rush her to their makeshift delivery room.  Rosalie leaves her side, unable to stand the smell of blood.  Edward cuts the baby out of Bella's stomach while Jacob performs CPR.  Edward successfully delivers the baby girl, Renesmee (who is half vampire, half human), but Bella is in critical condition with a broken spine and the bleeding wounds from Edward's surgery.  After letting Bella hold Renesmee for a moment, Edward injects his venom directly into her heart and bites her several times as well.  For the next three days, she becomes a vampire.