[Additional Requirements - like a progesterone test for dogs this requires collecting a small blood sample and then spinning it in a centrifuge. Centrifuge and needle/syringe (for collecting blood sample) are not included Skip the Trip to the Vet - save money time and energy with this dog pregnancy test kit at home a game-changing addition to your dog breeding supplies Reliable Early Results - accurately detects whether a dog is pregnant as early as 25 days after breeding letting you know if it’s time to prepare a whelping kit for puppies birth Simple and Straightforward - clear step-by-step instructions are included and results are easy to interpret with this dog pregnancy kit Serious Value - 2 tests are included so you can save the extra one for next time or retest to confirm the result. Much more affordable than an ultrasound machine for dogs!]