BB - i find that the main thing i notice with the puregon is the upset tummy. yes, i have hormonal changes (don't we all?!) but i've found the puregon does upset my tummy more than a little. i have IBS though, so figure i'm going to be one of thoe lucky people that if a drug says "might cause upset tummy" i'm going to get one no matter what!!
as BW mentioned, the water is to try to help you avoid OHSS. when you're stimming, a lot of extra fluid is drawn to your reproductive organs (hehehe, normal month you get one, maybe two follies - on ivf, you might get 20, so lots more fluid filled bits down there!). It is important to stay hydrated to stop that causing you any other health issues. BW has had OHSS pretty badly, so i'm sure she'll come back later and fill you in on the details!

