I've been raising rabbits for five years and Is till have so much trouble with this! I had one rabbit, Cobbler, whom I was CERTAIN was a girl at 8 weeks. I was so happy I waslike "oh yay, I finally got a doe instead a buck out of the litter!!" and then like 3 weeks later, I was checking my rabbits out, and I found out SHE was a HE!!! I was so mad.
So, does the study on this actually help you to tell? I have one rabbit at home (I mean I'm keeping it if it's a boy or a girl, so it really doesn't matter) that I really would like to know the gender of she/he's 8 weeks. I know, I'm horible...