My wife has only had two periods since November 2002. It dosnt seem to bother her and she seems healthy. Of the two periods one was induced by some drug she got from her Dr. She is 28 years old and had her tubes tied Nov 2001 after the birth of our son. Is this common, should we be worried.
Does she have any other symptoms? Is she under a lot of stress? She may want to have a physical just to check things out. Depending on if she has other symptoms she may have pcos. You can do a search on here and find out more about it. But missed periods is a symptom of it.
Your wife needs to see the doc and find out what is going on. If she hasn't had a recent pap/pelvic exam she should consider scheduling that at the same time too. It is better to get things checked out early then to let things go.