Fibroids

Okay I think I feel queasy already, and if any gent has had the misfortune to click onto this topic, he may wish to back quietly out

Fibroids. What can you tell me about them? My mum has them, has had for quite a while but she is rather anti-medical-intervention so hasn't done anything about it. But I hear that they can be more common in women in the same family, even though no one knows what their cause is. So my questions are:
Do I have a high chance of getting them?
How will I know if I have them?
Are they endo? Or only endo if in a certain place? Or not endo at all?
When can they develop up to (e.g. anytime up to menopause)?
Am I unlikely to get them before I turn 30?
Anything else?

Thanks!