but taking a rat to a vet to fix a messed up birth isnt really a good option. while it CAN be fixed.. imagine spending several hundred dollars for one $3 feeder rat.. so then you can have a several hundred dollar SPAYED rat which you cant even breed anymore..
if it is the umbilical something is pretty wrong.. it could be a prolapse.. the moms pushed out part of the birthing organs during labor.. in which case she'll die
if that is the problem.. and if it isnt fixed by now.. just kill her off and replace her with a new breeder female
dan