Guide

How soon can you tell if a dog is pregnant?

Home signs are mild and easy to miss for the first month. A vet test is the only reliable answer, and it works from about day 25.

Updated October 2026 · Information only, not veterinary advice

What you can tell, and when

Days after matingAt homeAt the vet
1 to 14Nothing reliableNothing reliable
14 to 21Possibly a clear mucus discharge or a slightly different mood or appetiteToo early for tests
21 to 28Nipples may become pinker and slightly larger. A little morning sickness is possibleExperienced vets may palpate, but it is not dependable
25 to 30Appetite may riseUltrasound or relaxin blood test
35 to 45Belly begins to broaden, more weight gainUltrasound shows more detail
45 onwardBelly obvious, milk may appear laterX-ray shows skeletons; count best from day 55

What to do in the first weeks

  • Keep her away from intact males until you are sure of the dates.
  • Do not change her food or give new supplements before talking to your vet.
  • Write down the mating dates and the first day of her season.
  • Book the ultrasound for day 25 to 30 using the scan date planner.

Questions

Frequently asked questions

Can you tell if a dog is pregnant after one week?

No. There are no reliable signs or tests in the first two to three weeks. Early signs, if any, are mild and can also happen with a normal heat cycle.

What is the earliest a vet can confirm pregnancy?

An ultrasound or relaxin blood test can confirm pregnancy from about day 25 to 30. An X-ray works from about day 45 and gives the puppy count late in pregnancy.

Can a human pregnancy test work on a dog?

No. Human tests detect a hormone dogs do not make. Dogs have a different pregnancy hormone, relaxin, and a vet or a dog-specific test is needed.

Does a dog’s belly get bigger early?

Not usually. Visible belly growth tends to start around week 5 to 6 and is clear by week 7 or later. A small litter or a deep-chested dog may show little.

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