How long are dogs pregnant?

63 +/-7 days from the date of the first breeding

typically 63 days from ovulation

A dog's pregnancy lasts about two months, or an average of 63 days from ovulation.

• The due date is expected to be 63 +/- 1-2 days from the date of the preovulatory serum LH peak.
• The duration of canine gestation, as timed from the preovulatory serum LH peak, is 65 +/− 1 d.