"Pyometra" refers to a medical condition in female animals, including dogs and cats, where the uterus becomes infected and fills with pus. Full definition
Choosing not to spay or neuter a dog leaves the animal at a relatively high risk of pyometra in female dogs and benign prostatic hypertrophy / hyperplasia in male dogs. (petsmagazine.ca)
Mercedes is a lovely, 8 year old pit bull mixed breed female who was diagnosed with pyometra in June, 2013. (fortheloveofalex.org)
Can only be used the first few days into pregnancy but largely increase the risk for pyometra which is a possibly life - threatening uterine infection. (breedingbusiness.com)