I am really hoping it will be a female as she will look just like this one, if its a male it will change quite a lot and not be quite as striking. In fact it will go a more grey/silver colours.
One of the main differences between male and females is that in most (if not all) live for different life spans. Males generally do not live as long as females and often the difference is quite substantial.
So the male looks quite a bit different although it is still a great looking tarantula.
By choosing to grow on tarantula slings it is impossible to tell the sex of the spider at such an early age. So its really 50/50.
So we just don't know the sex of some of them yet but if I could get to the molt of the P,irminia maybe I could sex it, but getting the molt now thats easier said than done ! this is one quick tarantula.