I think it’s very individual. Not everyone sees a dip in bone density. I had my DEXA yesterday and at 24 mos on Anastrozole I have held steady with .2 here or there. Normal spine, and right hip and osteopenia now in left hip. I’m 73 and have always had an active lifestyle and genetics also plays a role. I am so grateful that good well studied meds are out there for us if ( and when) we do need it.