Spay the cat

She’s just given birth…at least give her until the kittens are old enough to stop nursing - 6 weeks.

At least 6 weeks, depending on the kittens. At 8 weeks, definitely, otherwise you may run the risk of ocotcat!

Yes, you need to wait “atleast” 6 weeks, 8 to be sure. She just gave birth and it’s very important that she is able to nurse her kittens right now so you can not spay her just yet. Make sure you keep her away from any male cats for the next 8 weeks also to make sure she does not end up pregnant again.

I typed your whole question into Google…and found this:

How long after having kittens can she be spayed?

The mammary (breast) development that comes with nursing can make the spay surgery more difficult. Ideally, a month after weaning allows for regression of this tissue and spaying can proceed. Unfortunately, it is possible for a female cat to become pregnant during this waiting period if her owner is not careful.

http://www.marvistavet.com/html/body_the_feline_spay.html

How long after my female cat/dog has had kittens/puppies can I get her spayed?

Mother cats or dogs can become pregnant while nursing. It is important to keep a nursing mother away from other adult cats/dogs of the opposite sex. One can spay a mother as soon as the kittens or pups are weaned, (5 to 6 weeks for kittens and 4 to 5 weeks for puppies) and because of the risk of pregnancy this should be done.

http://www.spayusa.org/main_directory/01-faq/index.asp#8