What is the longest a pregnant dog carries before birth?
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Expert Answer
A dog’s pregnancy lasts about 58 to 68 days, with 63 days average, and going much beyond that risks problems, so the longest safe window is around 68 days before veterinary intervention is needed. Overdue litters need checks.
Track the mating date and prepare a whelping area. Contact a vet if labor is late or signs worry you.