How Long Are Dogs Pregnant? Due Date Guide

Quick answer Dogs are pregnant for about 63 days from ovulation. Counted from mating, puppies usually arrive 58 to 68 days later. A dog mated on 1 October is due around 3 December, with a normal window from 28 November to 8 December. Call your vet if there are no puppies by the latest date.

If your dog has been mated, the next question is when the puppies are due. The short answer is about 63 days, but the exact count depends on which date you start from. This guide explains the dog gestation period, how to count from mating, ovulation or the LH surge, how to confirm a pregnancy, how to prepare for whelping and when to call your vet.

How long is a dog pregnant?

Dog pregnancy lasts about 63 days from ovulation. Because mating and ovulation do not always happen on the same day, the Merck Veterinary Manual gives three ways of counting:

Counting from	Due date is about	Normal range
Mating	63 days	58 to 68 days
Ovulation (from a progesterone test)	63 days	62 to 64 days
LH surge (identified by a vet)	65 days	64 to 66 days

Counting from mating is the least exact because sperm can survive for several days and ovulation timing varies. If your vet has measured ovulation or the LH surge, use that date instead. In everyday terms, a dog is pregnant for about nine weeks, or just over two months.

A worked example

A dog mated on 1 October 2026 has these dates:

Date type	Earliest normal	Due around	Latest normal
From mating	28 November	3 December	8 December
From ovulation on 1 October	2 December	3 December	4 December
From LH surge on 1 October	4 December	5 December	6 December

Enter your own date and type in the Dog Pregnancy Due Date Calculator, or use the Dog Pregnancy Week Calculator to see which day and week of pregnancy she is in today.

Timeline from mating showing the normal dog pregnancy window of 58 to 68 days with about 63 days from ovulation, above the normal cat window of 61 to 69 days with 63 to 65 most likely.

Why dogs have a wide window

Why can puppies arrive over ten days when the “average” is 63? Two reasons:

Sperm survive for days. A mating that happens a few days before ovulation still results in pregnancy, so counting from mating includes that gap.
Ovulation is not tied to mating. Unlike cats, dogs ovulate on their own schedule during estrus. Concannon’s review describes the hormone changes that signal it. Without a hormone test, the exact day is unknown.

This is why the same mating can produce different due dates depending on the method. If you plan a litter, ask your vet about progesterone testing before mating, because it narrows the window to a few days.

Pregnancy week by week: counting the days

Counting from the mating date, week 1 is days 0 to 6, week 2 is days 7 to 13, and so on. The table is only a way to count; ask your vet what to expect at each stage.

Week	Days from mating
1	0 to 6
2	7 to 13
3	14 to 20
4	21 to 27
5	28 to 34
6	35 to 41
7	42 to 48
8	49 to 55
9	56 to 62
10	63 to 69

Most puppies are born in week 9 or 10, which is why the normal window of 58 to 68 days spans both.

The stages of a dog pregnancy in plain terms

Without going into medical detail, it helps to think of three broad phases:

Phase	Roughly	What owners usually do
Early	Weeks 1 to 3	Often nothing visible; keep her routine and book a vet visit
Middle	Weeks 4 to 6	Confirmation by ultrasound; ask your vet about food and exercise
Late	Weeks 7 to 9 and the due window	Prepare the whelping space; keep vet and out-of-hours numbers ready

These are broad groupings for planning, not medical stages. Your vet will tell you what to look for in your dog.

How to confirm a pregnancy

You cannot be sure from how your dog looks or behaves. Your vet can confirm a pregnancy in two ways:

Ultrasound, from about 25 days after mating.
A blood test (relaxin), which detects a hormone made during pregnancy.

A vet visit also lets you plan the whelping, ask about food and exercise, and learn the warning signs. Some dogs show a “phantom pregnancy” with symptoms that look real, which is another reason to have a vet confirm.

Feeding a pregnant dog

A pregnant dog does not eat like an ordinary adult. Her needs change during pregnancy and lactation, and the right plan depends on her size, condition and litter. Ask your vet rather than using the standard Dog Food Calculator, which is built for normal adult dogs. Do not change her diet suddenly, and do not start supplements without checking with your vet.

Exercise and routine

Most pregnant dogs can keep a gentle routine, but how much is right depends on her health and stage. Ask your vet. Avoid rough play and jumping late in pregnancy, and keep her away from other dogs who may carry infections unless your vet says it is safe.

Preparing for the birth

Choose a whelping space: quiet, warm, clean and easy to reach. A normal crate is usually too small; see our guide to what size crate a dog needs for how to think about space, and ask your vet about a whelping box.
Keep your vet’s out-of-hours number and the nearest emergency clinic’s details by the phone.
Note the dates so you know what is normal and when to call.
Ask your vet what to have ready at home and what to watch for.
Introduce the space early so she is comfortable using it.

When to call the vet

Call your vet straight away if:

There are no puppies by the latest normal date (day 68 from mating).
She has strong straining for 30 to 60 minutes without a puppy.
There are more than 2 to 4 hours between puppies while she still has more to deliver.
She has green discharge without a puppy.
She seems unwell at any point during the pregnancy.

If in doubt, call. Whelping problems can become urgent quickly.

After the puppies arrive

Keep her quiet, warm and well watered, and watch that every puppy is feeding and warm. Ask your vet when to bring her and the litter for a check and when the puppies should start vaccinations. Later, when the puppies are growing, the Puppy Age Calculator tracks their age in weeks.

Dog and cat pregnancy compared

If you share a home with both species, remember the timelines are close but not the same. Cats are pregnant for about 63 to 65 days from mating, with a narrower window because they ovulate after mating. Our guide to how long cats are pregnant has the table and a worked example, and the Cat Pregnancy Due Date Calculator handles the cat dates.

Before the pregnancy: the heat cycle

Every planned litter starts with timing. A dog is fertile during estrus, and the exact window is hard to see without a hormone test. Our guide to how long a dog stays in heat explains the stages and how often they come, and the Dog Heat Cycle Calculator estimates the next season. If you do not want puppies, speak to your vet about the options.

Common mistakes with dog due dates

Treating day 63 as exact. It is the middle of a window.
Counting from the day she was “tied” without noting repeated matings. If she mated on several days, work from the first date and expect a wider window.
Using the cat calculator for a dog. The timelines differ.
Feeding a pregnant dog like a normal adult. Ask your vet.
Waiting too long to call. If something looks wrong, call early.

Keeping a record of the mating

Good records make due dates more accurate. Write down every date the two dogs were together, even if you are not sure the mating “worked”. If your vet ran progesterone tests, keep the results and the date of each test. When you call the clinic you will be asked for the dates, so having them in one place saves time.

Record	Why it matters
All mating dates	Sets the earliest and latest possible due dates
Progesterone test dates	Can pinpoint ovulation and narrow the window
Date of vet confirmation	Starts the clock for ultrasound follow-up
Weekly notes	Appetite, weight, behaviour and any discharge
Calendar dates for the window	Easier to follow than counting days

If there were two matings three days apart, for example 1 October and 4 October, work out the window from both and expect the birth to fall within the combined range. A vet can usually refine it with an ultrasound.

Litter size and why it affects timing

Litter size varies with breed and with the individual dog, and your vet can usually estimate it with an ultrasound or an X-ray later in pregnancy. Larger litters can sometimes arrive a little earlier and smaller litters a little later, but that is a general tendency rather than a rule. Treat any estimate of the puppy count as approximate, and do not assume the whelping is finished until your vet, or the signs you were told to watch for, say so.

Phantom pregnancy

Some dogs show signs of pregnancy, such as nesting, milk and weight change, without being pregnant. This can follow a heat. If your dog shows these signs and was not mated, or the vet finds no puppies, ask about it. It is another reason to have the pregnancy confirmed instead of relying on how she looks.

Why we do not give pregnancy feeding amounts

A pregnant or nursing dog needs more food than a normal adult, but how much depends on her size, condition and the number of puppies. A table of amounts would not suit every dog, so the calculators on this site are built for normal adult dogs and puppies, and we leave pregnancy and nursing to your vet. They will weigh her, set a plan and change it as the pregnancy goes on.

Choosing and trusting the date you use

Three practical rules keep the dates sensible. First, always use the earliest mating date as the start of your “earliest normal” day and the latest mating date as the start of your “latest normal” day. Second, if a progesterone test or the LH surge was identified, switch to that date, because it is more precise than the mating date. Third, when your vet’s ultrasound gives a different estimate, follow the vet, who has seen your dog. The calculator is a planning tool that helps you ask better questions, not a replacement for the examination.

Quick summary

A dog is pregnant for about 63 days from ovulation, or 58 to 68 days from mating.
If a vet measures ovulation or the LH surge, use that date; it narrows the window.
A dog mated on 1 October is due around 3 December, with a normal range of 28 November to 8 December.
Confirm pregnancy with ultrasound from about 25 days or a blood test.
Ask your vet about food, the whelping space and warning signs.
Use the Dog Pregnancy Due Date Calculator with the best date you have.

Frequently asked questions

How long are dogs pregnant?

About 63 days from ovulation. From mating, puppies usually arrive 58 to 68 days later because sperm can survive several days.

How can I tell if my dog is pregnant?

Your vet can confirm by ultrasound from about 25 days or by a blood test (relaxin).

When should I call the vet during whelping?

If there is no puppy after 30 to 60 minutes of strong straining, more than 2 to 4 hours between puppies, or green discharge without a puppy.

Why is there a range of dates?

Mating and ovulation do not always happen on the same day, so counting from mating is less exact. The range of 58 to 68 days shows the normal spread.

What if I know the ovulation date from a progesterone test?

Use it: the due date is 63 days later, give or take a day. If a vet identified the LH surge, birth is around 65 days after it.

Should I change my dog's food during pregnancy?

Pregnant and nursing dogs have different feeding needs, so ask your vet instead of using the standard adult food amount.

How many weeks is a dog pregnant?

About nine weeks. Most puppies arrive in week 9 or 10 counted from the mating date.

Sources

Reviewed by the CalcuPaw Veterinary Review Team

Last reviewed 18 Oct 2026 · Meet the review team · This guide is general information, not veterinary advice.