Dog pregnancy signs week by week

Summary: Dog pregnancy lasts about 63 days, and the signs arrive in three waves. Weeks 1 to 3 are nearly invisible, with a brief appetite dip around week 3 as the first hint. Weeks 4 to 6 bring vet confirmation (ultrasound from day 25) and a visibly rounder belly. Weeks 7 to 9 are nesting, restlessness, and the temperature drop below 99°F that means puppies within about 24 hours.

You think your dog might be pregnant, and the internet keeps telling you to “watch for changes.” Which changes, and when? Here is the week-by-week version, tied to the days that actually matter.

Know the mating date? The dog pregnancy calculator turns it into a due date and a dated whelping calendar.

In this article

• Signs by week at a glance
• Weeks 1 to 3: the quiet phase
• Weeks 4 to 6: confirmation and visible changes
• Weeks 7 to 9: the final stretch
• When to call the vet
• FAQ

Signs by week at a glance

Week	Days	What you may see
1–2	1–14	Nothing; embryos travel to the uterus
3	15–21	Appetite dip, calmer mood, pinker nipples
4	22–28	Brief “morning sickness”; ultrasound possible from day 25
5	29–35	Appetite climbs; waist starts to thicken
6	36–42	Belly visibly rounder; nipples enlarge
7	43–50	Belly drops; X-ray can count puppies (day 45+)
8	51–56	Nesting begins; milk may appear
9	57–63+	Restlessness, temperature drop, labor

Weeks 1 to 3: the quiet phase

Almost nothing shows in the first two weeks, and that is normal: the embryos are still traveling and only implant in the uterine lining around days 16 to 18. Keep her routine exactly as it was.

Week 3 brings the first real hint. Hormone shifts around implantation cause a brief appetite dip in many dogs, sometimes with a calmer, clingier mood and slightly pinker nipples. Dog “morning sickness” is real, and a short appetite dip around week 3 is often the first visible sign of pregnancy. It should pass within a few days; a dog who refuses food entirely for more than a day or two needs a vet, pregnant or otherwise.

Weeks 4 to 6: confirmation and visible changes

This is when guessing can stop. An ultrasound confirms pregnancy from about day 25 and shows heartbeats. From about day 28, a relaxin blood test works too; relaxin is the hormone dogs actually produce in pregnancy, which is also why human home tests are useless for dogs.

Once confirmed, switch her gradually to a puppy or performance food; her calorie needs climb from mid-pregnancy onward. By weeks 5 and 6 the changes go public: the waist thickens, the belly rounds out, nipples enlarge, and appetite typically swings from the week-3 dip to noticeably hungry.

Weeks 7 to 9: the final stretch

Between days 45 and 50, puppy skeletons mineralize and an X-ray can count them. Get the count if you can: it is the only way to know for sure when whelping is finished.

Week 8 is preparation week. Set up the whelping box now so she settles into it before labor, because nesting behavior (digging, arranging bedding, guarding a spot) starts on its own schedule. Some dogs leak milk in the last days.

From day 58, take her rectal temperature twice a day. A drop below 99°F (37.2°C) usually means labor within about 24 hours. Restlessness, panting, and refusing food round out the final signs. For the dated version of this entire schedule, run the dog pregnancy calculator with your mating date.

When to call the vet

Call immediately if any of these happen:

• Day 68 arrives with no labor
• Dark green discharge before the first puppy is born
• Active, hard straining for 30 to 60 minutes with no puppy
• More than two hours of rest between puppies when you know more are coming
• Fever, collapse, or anything that feels wrong to you

An unnecessary call is free. A delayed one is not.

FAQ

What is the earliest sign a dog is pregnant? Usually the week-3 appetite dip with a calmer mood and pinker nipples. None of these are proof; the earliest reliable confirmation is an ultrasound at day 25.

Can I use a human pregnancy test on a dog? No. Human tests detect hCG, a hormone dogs never produce. The canine equivalent is the relaxin blood test at your vet, reliable from about day 28.

How long is a dog pregnant? About 63 days from mating, with most litters arriving between day 58 and day 68. The calculator maps the whole timeline to real dates.

Could it be a false pregnancy? Possibly. False pregnancy is common in unspayed dogs and mimics the real thing: swollen nipples, nesting, even milk. It typically resolves on its own within a few weeks; an ultrasound settles the question, and your vet should see her if symptoms persist.

Sources

1. Merck Veterinary Manual. Whelping and Queening in Bitches and Queens.
2. American Kennel Club. Dog Pregnancy: Signs, Care, and Preparation.
3. VCA Animal Hospitals. Breeding for Pet Owners: Pregnancy in Dogs.