A week to shed isn't based on anything. It could remain for quite some time. It's caused by the aromatase enzyme that is combated by using an AI. Had an AI been used, maybe a week it would have dropped. But had an AI been used, you may have had no issues with water to begin with. I don't know about most here, but when I'm on, stored water is my enemy. Nothing worse to me than to hold water. It drives me crazy and I'm very ocd about it.