This was around 20 or so years ago, and I don't know the full details, but I have an aunt who was unable to carry boys. I don't know whether it was because of the fact that she has severe PCOS, or whether it was something else that caused it.

They did testing and found out that every baby she lost was male, but she gave birth to two healthy girls in the end... and it scares me to think that those cousins of mine are now over 21!

BW