The new trailer for the upcoming two-part romantic-fantasy film, "The Twilight Saga: Breaking Dawn Part 1" is available to us. 　In Part 1,Bella will be struggling with being pregnant with a half-human and half-vampire baby, while their unborn child will pose threat to the two opposing sides, the wolves and the vampires. 　Directed by Bill Condon and reprised by the main cast members, part 1 of the fourth and final installment of the Twilight series, will be released on November 18th this year, while Part 2 will be hitting the theaters on November of 2012.