One of my mini-nubian does has grown a little beard during her pregnancy.
I seem to remember having a lot of hair growth myself as a pregnant woman, is that the same sort of process I wonder? That was the longest my hair ever grew in my life, during my pregnancies, and I had more arm hair and such at that time too.
In pygmies, I've noticed they seem to follow family lines (so relatively heritable) and they seem more common in caramels. Here's my beardies:
Rockstar
Rockstar's Mom, Bobbie Sue
Sugar
Rockstar's half sister (also a brown caramel) also has a beard. No breeding problems that I've seen. In fact, some of my most easy kidding girls.