Normal average pregnancy for dogs lasts between 64-66 days but, the apparent length of pregnancy assessed from the time of mating may vary between 56 and 72 days since both early and late matings may be fertile.
Normal average pregnancy for dogs lasts between 64-66 days but, the apparent length of pregnancy assessed from the time of mating may vary between 56 and 72 days since both early and late matings may be fertile.