There's probably been many threads about this, and I've certainly mentioned this several times before. I vividly remember meeting Paula Bircumshaw years ago and struggling not to stare at the hair clearly breaking off around her forehead.
And since I've been showing an interest again the last few years it appears that some of the top women might be attempting to conceal male pattern baldness beneath wigs, etc.
The various hormone guru's will probably have an opinion on what sort of compounds cause this (DHT derivatives, maybe?) but I'm happy to see that at least one top FBB has decided to ditch the wig and embrace her new hairline. (If anyone has any recent pics of Lenda Murray sans wig they would be appreciated)...