Hi Kate,<br><br>The reason we are told to drink so much water is to help prevent Ovarian Hyperstimulation. You need to keep as much water passing through your body, because all the of the bodies natural liquid fills the follicles up once the eggs have been taken out of your follicles. Although drinking water can't guarantee that you wont get OHSS, it is supposed to really help.<br><br>Good luck<br><br>Donna XXX