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How long are dogs pregnant?

Updated: Dec 7, 2023

Unraveling Canine Pregnancy: Understanding the Timeline and Milestones

Pregnancy is an incredible and transformative journey that leads to the miracle of new life. For our canine companions, this journey, though shorter than human gestation, is no less astounding. Understanding the duration and the progression of a dog's pregnancy can help pet owners provide the necessary care and support. So, how long are dogs pregnant?

The Canine Pregnancy Timeline

On average, a dog's pregnancy lasts about 63 days, or approximately two months. However, it can range from 58 to 68 days depending on various factors such as the dog's breed, size, and health condition. This period is often divided into three stages, similar to humans, each carrying its unique set of changes and developments.

Stage 1: Days 0-21

The first three weeks of a dog's pregnancy may not show obvious signs. The mating and fertilization process occurs during this stage, but it is difficult to confirm pregnancy at this early stage.

Within the first week following successful mating, the sperm will fertilize the eggs in the fallopian tubes. These fertilized eggs, now embryos, travel to the uterus where they evenly distribute along the uterine lining. This process is known as implantation and it typically occurs around days 17 to 21.

During this stage, dogs may experience slight behavior changes due to hormonal shifts. They may become more affectionate or, conversely, more withdrawn. Some dogs might also experience morning sickness, similar to humans, but it's relatively rare.

Stage 2: Days 22-42

The second stage is when significant developments start to occur. Around day 22, the embryos begin to shape into fetuses. At this stage, they start developing organs and facial features. The size of the uterus expands to accommodate growing puppies, which may cause the dog's waistline to thicken slightly.

From day 22 onward, veterinarians can typically confirm pregnancy through an abdominal palpation or an ultrasound. The ultrasound can not only confirm pregnancy but can also show the heartbeats of the puppies.

During this stage, the pregnant dog might start to eat more than usual as her body requires additional nutrients for the growing puppies. It's crucial to provide a balanced and nutrient-rich diet.

Stage 3: Days 43-63

The third and final stage is when the puppies' growth accelerates, and the pregnant dog's body prepares for the impending birth. The puppies continue to develop, forming their coats and claws, and by around day 45, the skeletons mineralize and become visible on an X-ray. This X-ray can also give a good estimate of the number of puppies.

The dog's abdomen will be noticeably larger, and her nipples will become more prominent in preparation for nursing. During this stage, she might start 'nesting', seeking out a safe and comfortable space to give birth.

From day 58, the dog could go into labor at any time. Monitoring her closely, noting changes in her behavior, body temperature, and appetite, is essential as these changes can indicate that labor is imminent.

Caring for a Pregnant Dog

Taking care of a pregnant dog requires a combination of balanced nutrition, regular vet check-ups, and a safe, comfortable environment.

A high-quality diet is crucial throughout pregnancy, but particularly during the last few weeks when the puppies are growing rapidly. The pregnant dog will need a diet higher in calories and nutrients. Regular vet visits are vital to monitor the dog's health and the progression of the pregnancy.

Also, providing a quiet and comfortable space for her to give birth will help the process go smoothly. This area should be easily accessible, clean, and warm.

The Miracle of Birth: Whelping

Once the gestation period is over, the next phase is whelping or the birthing process. This stage varies greatly among individual dogs, but can last anywhere from a few hours to a full day. It's critical to have a vet's contact details handy, and to intervene only when necessary. Once the puppies are born, they should begin nursing immediately, marking the start of another beautiful phase: motherhood.


Understanding the timeline and stages of a dog's pregnancy is essential for any dog owner planning to breed or those who think their dog might be pregnant. Knowing what to expect can help ensure that the dog gets the care she needs and that she and her puppies have the best chance for a healthy and happy life. Pregnancy, birth, and puppies are all part of the incredible journey of life, and knowing more about these processes can only deepen our appreciation for our amazing canine companions

84 Acres Canine Country Club ( is a leading, fully licenced, doggy day care provider for dogs in London. Specifically providing doggy day care in Paddington, Nottinghill, Holland Park, Hammersmith, Belgravia, Kensington, Chelsea, Fulham, Sloane Square, Pimlico, Battersea, Acton, St John's Wood, Clapham, Wandsworth, Wimbledon, Barnes, Putney and Richmond.

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