Factors that would influence a veterinarian's decision include:
* Stage of pregnancy: Flying in the later stages of pregnancy could pose a risk to both the cat and her kittens.
* Overall health of the cat: If the cat has any health issues, flying could be more dangerous.
* Length of the flight: Longer flights could increase stress and the potential for complications.
Your veterinarian can assess your cat's individual situation and provide the best recommendations for safe travel.