a high level of antibodies is not good. I have IVIG once a month, it takes 7 hours but it's worth it so I don't have to bother people several days a week to drive me to IVIG. I have had MG since I was 12, I've never had thymectomy. My MG has been controlled by my faith in the Lord and medication. If you levels are low or lowered then you should be able to cut back on IVIG, everyone is different. This is the first time I have ever had IVIG in the 27 years I have had MG. Hope this helps you. Any questions just ask!