How to Tell If My Dog Is Pregnant: Signs Week by Week
You usually can’t tell if your dog is pregnant in the first 3 weeks. The first signs, like bigger pink nipples and less energy, often show up around weeks 3–4, and a vet can confirm pregnancy with an ultrasound from about day 25. A growing, firm belly usually appears only around days 45–50.
Know the mating date? Our dog pregnancy calculator shows her likely due date and the best week for an ultrasound.
How long is a dog pregnant?
A dog is pregnant for about 63 days (9 weeks). If you count from the first mating, a normal pregnancy lasts 58–72 days. The range is wide because sperm can live inside the female for several days, so mating and fertilization don’t always happen on the same day.
That short time means each week brings big changes. Here’s what to look for.
Early signs your dog is pregnant (weeks 1–4)
The embryos attach to the uterus around day 18. Before that, there is very little to see. Many dogs show no signs at all in the first 3 weeks.
From about weeks 3–4, you may notice:
- “Pinking up.” The nipples get bigger and turn pinker. This is one of the more common early signs.
- Less energy. She may nap more and play less.
- More affection. Some dogs become clingy and want extra attention.
- Mild “morning sickness.” A few dogs eat less or vomit a little for a short time after the embryos attach.
None of these signs proves a pregnancy. Dogs that just finished a heat cycle can show the same changes even when they aren’t pregnant (see false pregnancy below).
Signs of pregnancy in weeks 5–8
The second month is when pregnancy usually becomes easier to spot:
- Bigger appetite and steady weight gain
- Peeing more often
- Clear, odorless discharge from the vulva
- A larger, firm belly, usually from about days 45–50
- Puppies moving in her belly, which you may see or feel from about day 50
- Behavior changes, such as being quieter or more protective
Her food needs rise in the last few weeks of pregnancy and rise even more while she nurses. Use our dog food calculator to see her normal daily calories, then ask your vet how much to add. Our guide on how much to feed your dog explains the numbers.
Week 9: signs labor is close
In the final days, look for:
- Nesting: digging, pacing, or shredding blankets to make a bed, often from about day 58
- Loss of appetite a day or two before labor
- Restlessness, panting or shivering
- A drop in body temperature. Take her rectal temperature twice a day in the last week. A drop to about 98–100°F (36.7–37.8°C) usually means labor will start within about 8–24 hours.
How vets confirm a dog pregnancy
Signs at home are only clues. A vet visit is the only reliable way to know. These are the main tests and when they work best:
| Test | When it works | What it tells you |
|---|---|---|
| Feeling the belly (palpation) | Around day 21–35 | Small swellings in the uterus, if your dog is relaxed |
| Relaxin blood test | From about day 22–27 | Pregnant or not (testing too early can give a false “no”) |
| Ultrasound | Best at day 25–35 | Confirms pregnancy and shows puppy heartbeats |
| X-ray | After day 55 for counting | Number of puppies, so you know when birth is finished |
An ultrasound done before day 21 can miss a pregnancy, so don’t book it too early. Puppy skeletons usually show on X-ray from about day 42–45, but an X-ray after day 55 is best for counting puppies.
An ultrasound has another big benefit: it can tell pregnancy apart from other reasons for a swollen belly, including a dangerous uterine infection called pyometra.
Can I tell if my dog is pregnant at home, without a vet?
You can watch for the signs above, but you can’t be sure at home, especially early on. Some points to keep in mind:
- Human pregnancy tests don’t work on dogs. They look for a hormone (hCG) that dogs don’t make.
- Dog pregnancy tests measure a hormone called relaxin, and they are blood tests normally run by a vet.
- Timing matters. If she hasn’t been in heat or around an unneutered male in the last 2 months, a swollen belly is probably something else, and she should see a vet.
Pregnant or just fat?
It’s a common question, especially with a dog that eats well. Some clues:
- Pregnancy: belly growth mostly in the second half (after about day 45), firm belly, bigger nipples, and a heat or mating in the last 2 months.
- Weight gain from food: fat builds up slowly all over, including the ribs, back and neck, and isn’t tied to a heat cycle.
If you’re unsure, an ultrasound or X-ray gives a clear answer.
Pregnant or a false pregnancy?
A false pregnancy (pseudopregnancy) is fairly common in unspayed female dogs. It happens because of hormone changes after a heat cycle, even when no puppies are growing. Signs can look exactly like a real pregnancy:
- Weight gain and bigger mammary glands
- Making milk
- Nesting, “mothering” toys, or guarding a spot
- Restlessness, less appetite or less activity
- Licking her belly, or acting grumpy or protective
There is no blood test for false pregnancy. A vet confirms it by checking that she isn’t pregnant, usually with an ultrasound. Most false pregnancies go away on their own within a few weeks. Don’t massage or milk her nipples, because that makes her produce more milk. If you don’t plan to breed her, ask your vet about spaying. Vets usually spay once the false pregnancy signs have passed, not during them.
When to call the vet
Book a regular vet visit to confirm the pregnancy about 4 weeks after mating, and plan an X-ray in the last week or two to count puppies.
Call your vet right away if your dog:
- Has green, black, bloody or bad-smelling discharge during pregnancy, or pus-like discharge after a heat
- Is drinking a lot, very tired, vomiting or not eating for more than a day, especially after a heat (these can be signs of pyometra, which is an emergency)
- Seems weak, in pain or ill at any point in pregnancy
- Is more than 70 days past a known mating date with no puppies
- Strains hard for more than 30 minutes without a puppy, or goes more than 2 hours between puppies when more are expected
- Doesn’t start labor within about 24–36 hours after her temperature drops
The bottom line
Early dog pregnancy is hard to spot. Watch for pink, bigger nipples around weeks 3–4 and a growing belly after day 45, but see your vet for an ultrasound at about 25–35 days to know for sure. Plug her mating date into our dog pregnancy calculator to plan vet visits and her due date. Once the puppies arrive, you can track their growth with the puppy weight calculator and our guide on how big your puppy will get.
Frequently asked questions
How early can you tell if a dog is pregnant?
Most dogs show no clear signs in the first 3 weeks. A vet can sometimes feel small swellings in the uterus around day 21, a relaxin blood test can turn positive from about day 22–27, and an ultrasound is most reliable at about 25–35 days.
Can you tell if a dog is pregnant with a human pregnancy test?
No. Human pregnancy tests look for a hormone called hCG, which dogs don't make. Dog pregnancy blood tests measure a different hormone, relaxin, and your vet can run one from about 3–4 weeks after breeding.
Can you tell if a dog is pregnant by her nipples?
Sometimes. Many pregnant dogs 'pink up' around weeks 3–4: the nipples get bigger and pinker. But dogs with a false pregnancy can have the same change, so nipples alone can't confirm a pregnancy.
How can I tell if my dog is pregnant or just fat?
A pregnant dog's belly gets bigger and firmer mainly in the second half of pregnancy, usually along with bigger nipples and a recent heat or mating. Fat tends to build up all over the body. The only sure way to tell is a vet check with ultrasound or X-ray.
How long is a dog pregnant?
About 63 days, or 9 weeks. Counted from the first mating, a normal pregnancy lasts 58–72 days. You can find a likely due date with a dog pregnancy calculator.
Sources
This guide is for general information and does not replace advice from your veterinarian. If you are worried about your pet, contact your vet. How we write our guides.
