I've used the BellyLab test a few times now and it has been accurate every time...no puppies...but accurately tested not pregnant. The last time I went to use a test,there was very little buffer solution and it appeared that it had possibly leaked out in the package. I contacted the company and was immediately sent a new test. Great customer service. And a pretty handy little way of telling if your girl is pregnant instead of taking her to the vet for an ultrasound.