Trivia: In the evidence depository in the beginning you can see Jason Voorhees' hockey mask (Friday the 13th), Leatherface's chainsaw (Texas Chainsaw Massacre), Michael Myers' mask (Halloween), and Freddy Krueger's glove (Nightmare on Elm Street). (00:00:45)
Trivia: The decision to turn the Child's Play/Chucky franchise from a slasher-horror to a dark comedy series was inspired by several factors. In addition to 1996's meta horror-satire "Scream" making self-aware horror-comedies popular, series creator Don Mancini also felt that by the time "Child's Play 3" had come out, Chucky had become such a pop culture icon, he might never be properly "scary" ever again, since people were too familiar with him. And thus, in order to keep the series fresh, he and producer David Kirshner decided to make the fourth film more comedic and self-aware in tone.
Trivia: The "Voodoo for Dummies" book Tiff reads was a prop made for the movie. The apparent author is Don Mancini, the script writer. There is however a "Complete Idiot's Guide to Voodoo".
Trivia: Though it was released seven years after the prior film "Child's Play 3," this movie actually only takes place about one month later, as "Child's Play 3" had a significant jump in the timeline following the previous two films.
Trivia: Chucky's line, "Why does that look so familiar?", was ad-libbed by Brad Dourif.
Trivia: Chucky voice actor Brad Dourif has stated that "Bride of Chucky" is his personal favorite film in the franchise.
Trivia: A rather peculiar tie-in product was planned for the film - an album featuring Chucky and Tiffany performing covers of various rock and love songs. Voice actors Brad Dourif and Jennifer Tilly even recorded several songs, but the album was quietly cancelled before it was completed.
Answer: As specified in Seed of Chucky it's a voodoo pregnancy. That's why the pregnancy last shorter than a normal one.
Mortug