Hi Liza, that bone doctor sounds pretty cluey and give's a lot of hope for a sucessfull union when your ready again.
I have seen through a family member how much the body relies on the Pituirity gland to make the proper amount of chemicals our bodies need.
I was told by my ortho surgeon that they don't like to give anymore than 3 cortasteriod injections to the hip as it can weaken the bone.
It does sound very promissing for you in the near future though.
good luck
Brian