Some experts believe that the virus does not cross the placental barrier to unborn kittens in utero or via breast milk during nursing. (catbreedsjunction.com)
Unborn kittens at 1 - 4 weeks gestation are usually killed by the infection and the foetus is reabsorbed by the mother or spontaneously aborted. (messybeast.com)
FIV may be transmitted to unborn kittens if their mother is infected during pregnancy. (catfriendly.com)