That is an interesting question. Is the act of conception (or, rather, the act resulting in conception) medical information? I guess the act has medical implications, but so does drinking coffee or eating a cheeseburger, if you define it broadly enough.
What if an employer made public the fact that an employee went skydiving, the result of which was death (or a broken ankle, etc.)? I don’t think the act of skydiving is medical information, but then again, I like to think the law is logical.
Have you been able to find the lawsuit online yet? I haven’t, but one report I read said the revealing info was in a letter the school sent to staff telling them she was fired for violation of her contract’s morality clause.
But I’d love to read the allegation in the suit, to find out what she is alleging was the revelation of her conception date.