@hopeful33250 my endocrinologist told me if I had the Reclast infusion I could probably go 18 months before having to think about doing anything again. Reclast is what she prescribed for her elderly mother-in-law who is physically and cognitively challenged and Reclast means fewer trips to the hospital.
With Prolia, my bone density is done on the day of my follow up appointment at the clinic (which is usually 18 months from the last appointment).