@sue417 no one tested me for my hormone levels when they put me on Letrozole. I wanted more information about it so I went to one of the blood testing labs that do whatever testing you want. You have to pay for it. Mine cost about 300. I got the results in one or two days. It was worth it to me since now I have something to go by. I live in Charleston, SC have no one except the cancer Dr. who I think is wonderful. But at the same time I have no one to call , no one to advocate for me. I've been insulted by a PA who worked for the surgeon and have not seen him since the surgery. Anyway we need more people to are helpful and not unkind.