Luke 1:56 (ESV)
And Mary remained with her about three months and returned to her home.
Seems like a long time for someone to go away during their pregnancy. I suppose her parents, they aren’t ever mentioned, wanted her to go somewhere for a while, while Joseph figured out what he was going to do. Of course it is these three months that her pregnancy would have been least notable. When she returned, I doubt there was any mistaking it. The angel spoke to Joseph. He didn’t speak to the others in town. I doubt it was all that pleasant of a time for her.