Mama was vaccinated

Our mama cat, who just had her kittens yesterday, was vaccinated before we knew she was pregnant. We asked the vet (it was one of those low-cost clinics) if she was pregnant before the vaccination was given - she said "maybe" but didn't seem concerned and gave the vaccine anyway. This was 44 days ago.

NOW I find out that you should never vaccinate a pregnant cat. I wish the vet had warned us and we would not have had her vaccinated at that time. The kittens were all born alive, seem healthy and without defect. Is there a chance they could have contracted FeLV from the vaccine? What exactly are the dangers associated with vaccinating a pregnant cat?

Developing fetuses are much more susceptible to damage by vaccine viruses than are kittens or adult cats and can lead to fetal death, abortions or congenital birth defects. Because of that risk I tend to believe that vaccinations during pregnancy should be avoided. However, there is some research that indicates that some Feline Upper Respiratory Disease vaccines may be safe in pregnant cats. If you do choose to vaccinate your cat, do so with a killed or inactivated vaccine.

This is what I got off a Website..