Field study assessing the performance of a patient-side blood test to determine neuter status in female cats based on detection of luteinising hormone.

A study evaluated the performance of a blood test in determining neuter status in female cats.  Residual blood samples from 236 female cats of unknown neuter were tested for luteinising hormone (LH). A positive LH test result indicated that the cat was neutered. Cats were examined for surgical scars suggestive of prior neutering and if scars were not found, an exploratory laparotomy was performed to confirm neuter status.

The prevalence of neutered cats in this sample was confirmed to be 49%. The specificity of the test in detecting neutered cats was 100% and the sensitivity was 69%.

 
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Study suggests that luteinising hormone testing can help veterinarians avoid surgery to confirm neuter status.