I guess it makes sense that they are advocating getting cats "fixed" earlier to prevent overpopulation. I just kept mine inside at least until then, but it's easy for them to get outside earlier and the "damage" is done. Thanks for the explanations.
fhsucade07, in Wisconsin, I've seen coyotes during the day, so I wouldn't let her out until she's better able to protect herself--run faster, climb better (climb down too--most kittens don't seem to figure that out).
Maybe you'll just want to call your local vet to see when he/she recommends spaying her. One vet I had, the one who recommended waiting longer, also did "European style" on my female cat--the incision is more on the side, not the tummy, so her organs didn't press on the incision while healing. She really did well after surgery, but I doubt if many vets do that.