How does birth control affect weight loss?

[Lashawn Cianciulli]

I have been on a strict weight loss program. I eat generally healthy and go to the gym 5 to 6 times a week and about three times with a personal trainer.
However, soon I am planning on getting into birth control pills. I have been told that your hormones go crazy with the pills... Would this affect my weight loss? I know it reacts differently with each woman... but what are the possibilities?

Thanks in advance!