Georgia--they were kind of fuzzy on timing. I saw something in the newspaper about it, which is why I questioned it. I believe the newspaper said up to 12 weeks, which is a long time. The lady on the phone here said 45 days. Best to call back where you are supposed to get the mammo and ask them the specific question. I got the impression from the lady I talked to that it was kind of a 'work in progress' about how long people should wait. I have it on my calendar to call them back a month after my second shot and check.