Keep levels normal: A pernicious anemia patient can work with her primary care and ob-gyn doctor to find out how often she needs injections to keep her B12 level normal. Haven't seen any reports of B12 injections causing pregnancy problems, if the B12 is being used to prevent B12 deficiency. A common dose is 1mg each shot, with the patient getting a shot every few weeks or every month, depending on need.
Answered 6/24/2014
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