Overview

Dog pregnancy (gestation) averages about 63 days from ovulation, but timing can vary. For first-time dog owners, a clear week-by-week plan makes it easier to support the mother, spot problems early, and prepare for whelping (birth).

Signs your dog may be pregnant

Early signs (often subtle)

• Mild appetite changes

• Sleepiness

• Slightly enlarged nipples

• More affectionate or more withdrawn behavior

Later signs

• Noticeable belly enlargement

• Weight gain

• Nesting behavior

• Milk production close to delivery

A “pregnant-looking” belly can also be worms, fluid, or false pregnancy—so confirmation matters.

Week-by-week timeline (weeks 1–9)

Week 1

• Fertilization may occur

• Behavior often unchanged

• Keep routine steady

Week 2

• Embryos start implanting

• Avoid stressful changes

• Maintain normal exercise

Week 3

• Some dogs get “morning sickness”

• Offer smaller meals if nauseous

• Schedule a vet check if you suspect pregnancy

Week 4

• Ultrasound may confirm pregnancy

• Slight weight gain can begin

• Start planning whelping supplies

Week 5

• Fetal growth increases

• Belly becomes more obvious

• Increase food gradually (quality matters)

Week 6

• Appetite usually increases

• Switch to a high-quality growth/puppy formula if advised

• Reduce very intense exercise

Week 7

• Nesting behavior may start

• Prepare a quiet whelping area

• Begin gentle coat/skin checks and nail trims

Week 8

• Milk may appear

• Monitor temperature if your vet recommends it

• Limit rough play and long trips

Week 9

• Puppies are nearly ready

• Keep the mother comfortable and calm

• Watch closely for labor signs

Nutrition changes during pregnancy

What to feed

• A complete, balanced diet (your vet may suggest a puppy/growth formula)

• High-quality protein and adequate calories

How to feed

1. Weeks 1–4: usually no big changes

1. Weeks 5–7: gradually increase calories

1. Weeks 8–9: smaller, more frequent meals (less stomach space)

Vet visits and what to expect

• Ultrasound (around week 4): confirms pregnancy

• X-ray (late pregnancy): helps estimate litter size and plan for complications (timing matters—done too early can be less useful)

• Parasite control guidance

• Vaccination timing (often avoid during pregnancy unless specifically recommended)

Preparing for whelping

Whelping area checklist

• Whelping box with washable bedding

• Heating pad (safe, low setting) or heat lamp with distance control

• Clean towels, gloves, digital thermometer

• Scale for puppies

• Vet phone number and emergency plan

Signs of labor

Common signs in the 24 hours before birth:

• Nesting, pacing

• Appetite drop

• Temperature drop (if monitoring)

• Restlessness

During labor:

• Strong contractions

• Straining

• Delivery of puppies and placentas

Caring for newborn puppies

• Keep puppies warm and dry

• Ensure each puppy nurses

• Weigh daily for the first week (steady gain is the goal)

• Watch for crying, chilling, or failure to latch

Using the dog pregnancy calculator

dogscalculator.com’s pregnancy calculator helps estimate:

• Expected due date range

• Week-by-week milestones

• Preparation reminders (whelping area, vet check timing)

Use it as a planning tool, and confirm timing with your vet—especially if breeding dates are uncertain.