Stewart, who recently shared a public kiss with Breaking Dawn co-star Robert Pattinson, spoke to Entertainment Weekly about the highly-anticipated birth scene.
"The birth is really effective, and I've heard it really hits you in the face," Stewart said.
The actress neglected to say whether the scene would be as graphic as it is in Stephenie Meyer's novel. However, Stewart did say that the scene could have been far more explicit.
She added: "It could have been shocking and grotesque, because that's how it was written in the book. I would have loved to have been puking up blood."
Breaking Dawn's wedding scene was recently filmed as well. The scene was shot with police protection following recent leaks.
The Twilight Saga: Breaking Dawn - Part 1 is expected to open in theatres on November 18.