Not if its an infection. The fetus would not attach to the uterine wall if there was infection.
You do have choices on treatment - you can spay or have the vet do prostaglandin therapy
http://marvistavet.net/html/body_pyometra.html
The prostaglandin treatment preserves the uterus for another breeding.
You may want to check the stud used for signs of infection too.
Hope this helps you!
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