Pseudopregnancy – frequently called “false pregnancy” – is common in intact female dogs somewhere between 6 to 12 weeks after a heat cycle. During this time, animals develop most if not all of the signs of pregnancy, even when they are not pregnant. False pregnancies are easy to diagnosis, and normally treatment is unnecessary.
False pregnancy occurs most commonly in dogs that are not spayed. Your veterinarian will need to run tests to determine if your dog is pregnant or just experiencing a false pregnancy. First your veterinarian will ask for a history of your dog’s heat cycle for the past 2 to 3 months. She will then peform a series of tests to determine your dog's condition.