Pregnancy Length in Dogs
Veterinary & Aquatic Services Department, Drs. Foster & Smith

Q. How long does a dog's pregnancy last?
 
A. Pregnancy in the dog lasts approximately 63 days. The normal due date can be about 1 week either side of the predicted 63 days. In cases of large litters, length is usually lessened. In cases of small litter numbers, length may increase.
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