Dog Pregnancy Test: How to Know If Your Dog Is Pregnant in 2026

There is no reliable at-home urine pregnancy test for dogs. Human pregnancy tests do not work on dogs because canine reproduction uses different hormones. Confirming dog pregnancy requires a veterinary visit using ultrasound (most reliable after day 25), hormone blood tests, or abdominal palpation by an experienced vet (day 28–35).

This guide is for informational purposes. Consult your veterinarian for confirmation of pregnancy and prenatal care advice.

How to Test If Your Dog Is Pregnant

Unlike human pregnancy, dog pregnancy cannot be confirmed with an over-the-counter urine test. Human pregnancy tests detect hCG (human chorionic gonadotropin), a hormone specific to human and primate pregnancies. Dogs use a completely different reproductive hormone — relaxin — and produce it in quantities too variable for reliable home detection.

The most reliable methods for confirming dog pregnancy are veterinary procedures performed at specific windows during the 63-day gestation period. If you suspect your dog is pregnant after a mating, schedule a vet appointment starting at day 25 post-mating for the earliest reliable confirmation.

Early Signs of Dog Pregnancy

Physical and behavioral signs can suggest pregnancy before veterinary confirmation, but none are definitive on their own:

• Nipple enlargement and color change (day 14–21): The nipples become slightly larger and may develop a pinkish tint — one of the earliest observable signs.
• Mild nausea or vomiting (day 21–35): Some dogs experience morning sickness during the third and fourth weeks. Decreased appetite, lethargy, and occasional vomiting can occur.
• Behavioral changes: Increased affection, nesting behavior, or reduced activity level may appear early in pregnancy.
• Abdominal enlargement (day 40+): The belly visibly expands during the second half of pregnancy. Some dogs show little change until the last 2–3 weeks.
• Weight gain: Gradual weight increase begins around week 4–5. By week 7, weight gain of 15–25% of normal body weight is expected for a litter of average size.

Important: pseudopregnancy (false pregnancy) can mimic all of these signs exactly. A dog that was not mated or whose mating did not result in fertilization can still show nipple development, nesting, weight gain, and behavioral changes. Only veterinary testing confirms actual pregnancy.

Pregnancy Timeline Week by Week

Dog gestation averages 63 days from ovulation. Timing varies slightly by individual dog.

Veterinary Confirmation Methods

• Relaxin blood test (day 21–25+): Relaxin is a hormone produced by the placenta in dogs. A blood test detecting relaxin is the most accessible early confirmation method — available through most veterinary clinics. Negative results before day 30 may be false negatives; retest if mating definitely occurred.
• Ultrasound (day 25–35): Ultrasound is the gold standard for early pregnancy confirmation. From day 25, embryonic fluid sacs are visible. By day 28, fetal heartbeats can be detected. Ultrasound confirms live pregnancies but cannot reliably count puppies.
• Abdominal palpation (day 28–35): An experienced veterinarian can feel individual embryos through the abdominal wall during this narrow window. The embryos are walnut-sized and palpable. After day 35, fluid fills around them, making individual detection harder.
• X-ray (day 45+): Radiography is the most accurate method for counting puppies and assessing their size relative to the birth canal. Not advised before day 45 due to radiation risk to developing fetuses. Essential for planning whelping when large litters or oversized puppies are suspected.

What to Do If Your Dog Is Pregnant

• Schedule a full prenatal veterinary examination as soon as pregnancy is confirmed
• Switch to a high-quality puppy food or food formulated for reproduction by week 5–6 (higher calorie, protein, and calcium)
• Avoid all medications, vaccines, and dewormers not specifically approved for pregnant dogs
• Set up a whelping box in a quiet, warm, draft-free area by week 7–8
• Learn the signs of complications: prolonged straining without delivery, green discharge before any puppies are born, fever, or extreme lethargy
• Have your veterinarian’s emergency number and the nearest 24-hour animal hospital contact ready

Find veterinary clinics experienced with canine reproduction on HeiBob.

Find a qualified veterinarian near you on HeiBob for prenatal care and pregnancy confirmation.