Biting!

[misa1]

What advice do you all have for when your baby bites during a nursing session? My 4 1/2 month old daughter already has two teeth broken through on the bottom and the top teeth will be in very soon. She has bitten me several times over the past week, getting progressively worse. Today she drew blood. I've tried just taking her off immediately and setting her down, but at 4 1/2 mos I'm not sure she makes the connection between the bite and being removed from the breast. At first the biting would happen towards the end of a feeding, so I started unlatching her when I knew she had eaten enough and was just sucking for pleasure. This last bite though was right in the middle of a feed. I looked up advice on several breastfeeding sites, but most of those sites seem to assume that the biter is an older infant or a toddler.

Any help would be appreciated, thanks!
Marya