[Ladymom]

I'd go ahead and schedule her spay for as soon as your vet feels it is safe to do it, usually about a month after she finishes her cycle.

Had she been spayed before she ever came into heat you would have eliminated her chance of ever getting mammary cancer. If you spay her before her second heat, the risk is still low, only 7%. If she has a second heat before she is spayed, her risk of cancer jumps to 25%.

Since heat cycles aren't every six months like clockwork, I'd make sure it done as soon as possible so she still get the health benefits of early spaying. You don't want a second heat to catch you off guard.