My doctor told me if i do not want U/S at certain visit please let him know as he will be very happy - he can do more check-ups on that day because U/S told quite a few minutes away from him which he can 'see' another patient or two and earning more. My husband told me if you know how much is one machine cost and the maintainance (which my husband is doing and charging :) then you will think it is not that "MUCH" your doctor is earning but sure, he/she will find 'ways' to earn - just like any other business. It is still up to us to decide, not the doctor.