Watch 'Breaking Dawn' Teaser Trailer - Bella (Kristen Stewart) Battles a Dangerous Pregnancy

A new 16-second teaser for the Breaking Dawn trailer has been revealed!

In the clip, Bella (Kristen Stewart)'s health is being affected as her baby grows to strong, OK reports.

"It's crushing you from the inside out," a worried Edward (Robert Pattinson) tells her.

Rob recently shared with Premiere magazine , that his girlfriend managed to scare him while filming the pregnancy scenes.

"There are scenes were Bella looks like an alien," Rob said of Kristen. "When the baby eats her from inside, she looks so thin and ghastly."