Just wondering how often you use them? Does your doctor know you're using it? And have you received any advice on how often you should/shouldn't be using it?
I've been able to find both babies HB's

and they tend to hover in the 130's mostly. It took me awhile to find them the 1st time, and I've used them twice since but as soon as I get the HB I listen for a few seconds and stop. Just want to make sure I don't overdo it!