Breaking Dawn (The Twilight Saga, Book 4)

Bella and Edward are married, but their honeymoon is cut short when Bella discovers she is pregnant. Her pregnancy progresses rapidly, severely weakening her. She nearly dies giving birth to her and Edward's half-vampire-half-human daughter, Renesmee, but Edward injects Bella with his venom to save her life by turning her into a vampire. A vampire from another coven sees Renesmee and mistakes her for an "immortal child", whose existence violates vampire law, and informs the Volturi. The Cullens gather vampire witnesses who can verify that Renesmee is not an immortal child. After an intense confrontation, the Cullens and their witnesses convince the Volturi that the child poses no danger to vampires or their secret, and they are left in peace.