[header] How to help your cat who had a miscarriage [title] Take your cat the vet if there is a late stage miscarriage. [step] If your cat miscarries late into her pregnancy, veterinary help is necessary. A late stage miscarriage can result in an infection. 
[substeps] The average length of a cat's pregnancy is 65 to 69 days. If a miscarriage occurs in the later parts of the pregnancy, take your cat to see a vet.