How Long Are Dogs Pregnant? Week-by-Week Guide to Dog Pregnancy

Dog pregnancy moves fast. What feels like a few weeks of waiting is actually nine weeks of rapid, complicated development, from a fertilized egg to a litter of puppies ready to breathe on their own.

If you're expecting puppies, or just suspect your dog might be pregnant, this guide covers what's happening week by week, what you'll actually be able to see and feel, how to care for your dog through it, and which signs mean you need a vet call.

How Long Is Dog Pregnancy?

The average is 63 days from ovulation, or about 9 weeks. But the range is 58 to 68 days, and this is normal, the variation depends partly on when mating happened relative to ovulation, and partly on litter size.

If you're counting from the breeding date (not ovulation), things get murkier. Sperm can survive in the reproductive tract for up to a week, so the breeding date isn't always the same as conception. This is why a vet's ultrasound or hormone testing gives a more reliable timeline than tracking from mating.

Week 1: Days 1–7

What's happening: Fertilization occurs in the fallopian tubes. The fertilized eggs (now called zygotes) travel toward the uterus and begin their first cell divisions.

What you'll notice: Nothing yet. Your dog looks, acts, and eats exactly the same. There's no reliable way to detect pregnancy this early.

What to do: Keep everything normal. This is not the time to change food, add supplements, or stress your dog with extra vet visits. Just wait.

Week 2: Days 8–14

What's happening: The embryos reach the uterus and begin implanting in the uterine lining. Each embryo settles into its own spot along the uterine horns.

What you'll notice: Still nothing visible. Your dog may be slightly more tired than usual, but this is easy to miss or attribute to other things.

What to do: Nothing specific. Avoid any medications, vaccines, or chemical flea treatments unless explicitly cleared by your vet, this is the most sensitive period for fetal development.

Week 3: Days 15–21

What's happening: This is where things accelerate. The embryos begin forming proper structures. By day 21, a skilled vet can sometimes feel the embryonic sacs during abdominal palpation, they feel like small, round, grape-sized swellings. The window for reliable palpation is days 21–35, so don't miss it.

What you'll notice: Some dogs experience a brief bout of morning sickness around days 21–25. Loss of appetite for a few days, occasional vomiting, and mild lethargy are common. It passes quickly.

You may also notice the nipples starting to change, becoming slightly pinker and more prominent. This is one of the earliest visible signs.

What to do: Schedule a vet visit if you want to confirm pregnancy. Ultrasound is reliable from about day 25 onwards and can detect heartbeats, giving you a puppy count estimate (though ultrasound isn't as accurate as X-ray for counting). There's also a relaxin hormone blood test that can confirm pregnancy from days 22–27.

Week 4: Days 22–28

What's happening: Major organ development. The spinal cords form, the faces begin to take shape, and eyes and limbs start developing. By the end of week 4, each fetus is roughly 14–15mm long.

This is the most critical period for fetal development. Anything that disrupts it, infection, poor nutrition, certain medications, can have lasting effects.

What you'll notice: Your dog's appetite may start to increase. The nipples are noticeably larger and pinker. The abdomen isn't visibly enlarged yet, but a vet doing palpation will be able to feel distinct embryonic swellings.

What to do: If you haven't done a vet visit yet, now is the time. Confirm pregnancy, get a rough count, and discuss nutrition changes. Your vet can also check for any signs of uterine infection or complications.

Week 5: Days 29–35

What's happening: Toes, claws, and whisker buds form. The fetuses are now recognizable as puppies under ultrasound. Sex can sometimes be determined. Growth is accelerating, fetuses nearly double in size this week.

What you'll notice: The abdomen starts to visibly enlarge. Your dog's appetite increases significantly. She may become more affectionate, or conversely, seek more alone time. Both are normal.

Clear or slightly milky vaginal discharge can appear and is normal at this stage. Anything brown, green, or bloody is not normal, call your vet.

What to do: Start transitioning to a higher-quality food if you haven't already. Many vets recommend switching to a high-quality puppy food in the second half of pregnancy, as it's calorie-dense and has the right nutrient profile. Do this gradually over several days to avoid GI upset.

Hold off on calcium supplements unless your vet specifically recommends them. Too much calcium during pregnancy can actually cause problems with labor.

Week 6: Days 36–42

What's happening: Skin pigmentation develops. The puppies have all their major organs and are growing rapidly. The mother's abdomen is now noticeably round and firm.

What you'll notice: The belly is unmistakably pregnant at this point. Your dog may be uncomfortable, especially in warmer weather. She may eat smaller amounts more frequently rather than two large meals, this is fine, adjust accordingly.

Mammary glands are enlarging and may be sensitive. Handle them gently.

What to do: Begin preparing the whelping area. Choose a quiet, warm, draft-free location and set up a whelping box, large enough for her to stretch out, with low sides she can step over but puppies can't escape. Introduce her to it now so she's comfortable with it before labor.

Reduce strenuous exercise. Gentle walks are fine; running, jumping, or rough play is not.

Week 7: Days 43–49

What's happening: The puppies are fully formed and spending the rest of pregnancy growing. The mother's abdomen is very large. Puppies are moving, and you can often see and feel them from the outside.

What you'll notice: Movement in the abdomen, you can place your hand on her side and feel the puppies shifting. She may start nesting behavior: scratching at bedding, seeking enclosed spaces, carrying toys or objects. This is instinct.

What to do: This is the ideal time for an X-ray to count puppies accurately. Bone density is visible on X-ray at this point. Knowing the exact number is important, you'll know when she's finished delivering, which prevents the dangerous situation of not realizing there's a puppy still inside.

Schedule this with your vet. It's one of the most useful things you can do before whelping.

Week 8: Days 50–56

What's happening: The puppies have their full coat of fur. They're getting crowded in there. The mother's body is ramping up for delivery.

What you'll notice: Your dog may lose her appetite as the puppies press against her stomach. She may seem uncomfortable, restless, or clingy. Mammary glands are enlarged and may start producing colostrum (the first milk), this can appear as a clear or yellowish fluid from the nipples.

What to do: Start taking her rectal temperature once or twice daily. Normal temperature is 101–102.5°F (38.3–39.2°C). A drop to below 99°F (37.2°C) is a reliable signal that labor is within 24 hours.

Have your whelping supplies ready: clean towels, gloves, dental floss for tying umbilical cords if needed, a heating pad for keeping puppies warm, a kitchen scale to weigh each puppy, and your vet's emergency number written somewhere visible.

Week 9: Days 57–63

What's happening: Final stretch. The puppies are ready. The mother's body is preparing for labor.

What you'll notice: Nesting behavior intensifies. She may refuse food entirely in the 24 hours before labor. Restlessness, panting, and shivering are common as labor approaches, this isn't pain, it's the hormonal shift.

When her temperature drops below 99°F and stays there, labor typically follows within 12–24 hours.

What to do: Stay close. Keep the environment calm and quiet. Limit visitors.

The three stages of labor:

· Stage 1 (6–24 hours): Contractions begin internally. She'll be restless, may pant, and may vomit. No puppies yet.
· Stage 2: Active pushing. Each puppy is delivered in its sac, which the mother breaks open and licks to stimulate breathing. Deliveries can be 30 minutes to 2 hours apart.
· Stage 3: Placenta delivery, one per puppy. She'll likely eat them, this is normal and instinctual.

When to Call the Vet During Labor

Call immediately if:

· She's been actively straining for more than 30–60 minutes without producing a puppy
· More than 4 hours pass between puppies and you know there are more inside
· A puppy is visibly stuck in the birth canal
· She has green or black discharge before the first puppy is born (some green is normal between puppies)
· She seems extremely weak, stops straining, or collapses
· Her temperature spikes above 104°F after delivery

A retained puppy or placenta is a medical emergency. This is exactly why the week 7 X-ray count matters, you'll know you're done when the number matches.

Nutrition During Pregnancy

Weeks 1–4: Normal diet. No changes needed. Don't overfeed.

Weeks 5–9: Increase food gradually. By the last three weeks, she may need 25–50% more calories than her pre-pregnancy amount. Switch to a high-quality puppy food or a food specifically formulated for pregnancy and lactation.

Feed smaller, more frequent meals in the final weeks, large meals are uncomfortable when she's heavily pregnant.

What to avoid:

· Raw fish or raw meat (parasite risk)
· Excess calcium supplementation (can interfere with labor)
· Any foods toxic to dogs, a full list is here
· New foods or dramatic diet changes in the final week

Signs Something Is Wrong

Get your vet involved if you notice:

· Vaginal discharge that's brown, green, or bloody (before labor)
· Fever above 103°F at any point during pregnancy
· Signs of pain, significant weight loss, or refusal to eat for more than 2 days
· Shaking or trembling, this can indicate hypoglycemia, eclampsia (milk fever), or pain
· Unusual lethargy or any behavior that feels wrong to you

Trust your gut. You know your dog. If something feels off, call your vet, that's what they're there for.

After Whelping: The First Few Weeks

The hard work doesn't stop at delivery. The mother needs:

· High-calorie food available at all times, nursing demands enormous energy
· Fresh water constantly
· A warm, quiet, clean whelping area
· Minimal handling of the puppies by strangers for the first two weeks

Weigh each puppy daily for the first two weeks. A healthy puppy gains weight every day. A puppy losing weight or not nursing is an emergency.

At 6–8 weeks, puppies can begin the weaning process and are ready for their first vet checkup and vaccines. This is also when you start the early training foundation that shapes them for life.

The Bottom Line

Dog pregnancy is 63 days of rapid development, and the more you understand what's happening each week, the better prepared you'll be. Get a vet involved early for confirmation and a puppy count. Adjust nutrition in the second half. Prepare your whelping area before you need it.

And get your vet's emergency number saved in your phone. Even straightforward deliveries can turn urgent fast.