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Signs Your Dog Is Pregnant

Later Signs

By the end of your dog's second trimester, her belly will get bigger. Around this time (by day 40), her nipples will begin to get darker and larger, too. As your pet's due date gets closer, her breasts will enlarge, and a little milky fluid may trickle out.

Your vet may ask you to come back at the start of the third trimester (around day 45) if he wants to take X-rays of your dog's belly. This can be used instead of an ultrasound to check on the bone structure of growing puppies. It's one way to figure out how many puppies will be in your dog's litter.

As more time passes, your dog's pregnant belly will become larger, and it may sway gently beneath her as she walks.

During the last 2 weeks of pregnancy, you may see and feel the growing puppies moving inside your dog's belly. Your vet may want to see your pet one final time. Sometimes vets take X-rays during this visit to find out how many puppies are on the way. You'll learn what to expect when your dog is giving birth to her puppies (called whelping) and who to call if there is an emergency. You'll also find out how to care for newborn puppies.

WebMD Veterinary Reference

Reviewed by Amy Flowers, DVM on October 7/, 014
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