This girl is in desperate need of a moult. She has rubbed the setae off her carapace and she is looking almost as bald as my mature males after not moulting for years. She's still happily eating, though. I guess a moult isn't in the cards yet.
I'm almost sure that it's a she.
the spider is a little over an inch (turned 3rd instar)
I don't think it's very visible on the picture but the ''ventral part'' really sticks out.
(the molt is too small for my phone to make good pictures of and I don't have any 'tools' to sex with.)