Ack, this was driving me crazy.... I knew Jan used a term other than "autopsy" in describing why she thought Michael came to visit her, but I could not for the life of me remember what she said. I tried googling it and failed, so I had to open that episode on Netflix and fast-forward to the scene.
Post mortem. She called it a post mortem.
Whew, I feel better now.
And no, I don't recall that I've ever dissected a relationship with an ex.