I'm assuming she didn't achieve a pregnancy (if she had, it would have been in the lede), so maybe it's an ongong quest on her part.
The Catholic school doesn't want to be forced to be a payer-provider for more procedures that kill "leftover" kids. So if she told them she's got plans for more lab babymaking attempts, maybe the only way they could evade becoming material cooperators was to terminate her employment.
Just a guess. I don't know. I'm just trying to read between the lines.
Insurance almost never covers fertility treatments of any kind, let alone IVF.