Interesting thread!
In my local, all 7 founding members remained active through graduation. I pledged with 4 other women; one disappeared when we became a colony of AEPhi but the rest of us remained active through graduation.
Since we became a chapter of AEPhi, I don't believe anyone has ever depledged. I can think of only a handful of women who deaffiliated. Most of those were due to a reorganization that happened the year after I went alum (i.e. women resigning in protest). So we had, and still have, a pretty high retention rate through the collegiate years.
Some other chapters at my school have poorer retention rates. My freshman year, XYZ took quota of 32; 16 were still active at graduation.
