@sophie93 It’s a good question, then, to ask your prescribing doctor. My endocrinologist told me that I need these bimonthly blood tests to monitor calcium levels as Evenity “redirects” blood level calcium to build bone density. If my calcium blood level drops then I need to reschedule the monthly Evenity injections and contact my endocrinologist to see what he would want me to do. So far my calcium levels remain in the normal range.