This may sound a little cold, but there are already more kittens in the world than there are homes for. I would recommend spaying her while she is pregnant. If the uterus is never opened during the surgery the kittens never "wake up" so they don't feel any pain or suffering.Is it too risky? Would you rather wait and let the queen go to term and 6 weeks for lactation or just abort the kittens?
The uterus is larger and more vascular. This means that the spay incision will need to be larger, the surgeon will have to pay very close attention to preventing hemorrhage (but we have to do that in every surgery anyway) and the surgery will most likely take a little bit longer in the pregnant cat. These increase the risk slightly, but not so much to avoid performing the surgery.I hope so too. My question was really about the medical part of it: Are there more risks involved if the vet also has to remove placentas and amniotic sacs?