i agree with those that say it's dangerous and not at all a healthy way to loose weight. maintennance afterwards is too hard for most people and they almost always gain all the weight and MORE back. not a good diet if you ask me if it'll make you starve your body half to death and then gain MORE weight later. as a pregnant woman, these hormones are NOT something to be playing around with just to loose weight. the hormones make your body starve and that's never good. people need 2000 calories per day on average, dropping to 500 is very dangerous. it's like being anorexic but trying to confuse your body to be that way.
i highly recommend a different plan such as weight watchers or any other diet/exercise. EAT HEALTHY and MOVE UR BUTT and you'll have a much better lifestyle forever and not just for a few moments in life.