Stages of Dog Pregnancy: What to Expect Week by Week

Dog pregnancy lasts approximately 63 days from ovulation — roughly nine weeks. Understanding the stages of dog pregnancy helps you support the mother appropriately, recognize early signs of problems, and prepare for whelping with confidence.

This guide covers the key stages of pregnancy in dogs week by week, from fertilization through delivery, including early signs of pregnancy to watch for and what normal development looks like at each phase.

Early Signs of Pregnancy in Dogs

The first visible signs of dogs pregnancy typically appear between weeks 3 and 5, after the embryos have implanted in the uterine wall. Before implantation, there are no reliable physical signs visible to the owner.

Weeks 1 to 2: No visible changes. Fertilization and early cell division occur. The dog appears and behaves completely normally.
Week 3: Embryos implant in the uterine wall. Some dogs show mild appetite changes, slight lethargy, or occasional morning nausea. Nipples may begin to appear slightly larger or pinker.
Week 4: A veterinarian can confirm pregnancy by palpating the abdomen or using ultrasound. Fetuses are approximately the size of a grape. This is the period of greatest risk from medications, stress, and nutritional deficiencies.

Middle Stages: Weeks 5 Through 7

The middle stages of dog pregnancy are characterized by rapid fetal development and visible changes in the mother.

Week 5: Fetuses develop distinct features — toes, claws, and facial structures form. The abdomen begins to expand noticeably. Appetite usually increases. The dog may need to urinate more frequently as the uterus grows.
Week 6: Fetuses continue rapid growth. The abdomen is clearly enlarged. The dog’s nipples and mammary glands enlarge significantly in preparation for nursing. Energy levels may decrease as the body resources shift toward fetal development.
Week 7: Fetuses are now fully formed with fur beginning to develop. The dog’s abdomen is large and movement of the puppies may be visible externally. X-rays taken from week 7 onward can count the number of fetuses by visualizing the skeletal structures.

Late Stages: Weeks 8 and 9 — Preparing for Whelping

The final week of dog pregnancy stages day by day involves preparation for birth, which owners should actively support.

Week 8: The dog may begin seeking quiet, secluded spots to rest — early nesting behavior. Colostrum may be expressible from the nipples. Appetite may decrease as the fetuses press against the stomach. Continue offering smaller, frequent meals of a high-quality food formulated for pregnancy or lactation.
Week 9 (Days 57 to 63): Labor is approaching. Set up a whelping box in a quiet, warm, draft-free area. The dog will investigate and begin spending time there. A rectal temperature drop below 99°F (37.2°C) — normal is 101 to 102.5°F — typically signals labor within 12 to 24 hours.

Signs of Labor

Active labor in dogs occurs in three stages:

Stage 1: Uterine contractions begin but are not yet visible externally. The dog becomes restless, pants, shivers, or vomits. This stage lasts 6 to 12 hours in most dogs.
Stage 2: Visible abdominal straining begins and puppies are born. Each puppy should be delivered within 1 to 2 hours of active straining. A wait of more than 2 hours between puppies with continued straining requires veterinary attention.
Stage 3: Placentas are expelled, typically one after each puppy. The mother will chew the umbilical cords and may eat the placentas — this is normal behavior.

Nutritional and Veterinary Care During Pregnancy

Good prenatal care includes:

Switching to a puppy or all life stage food by week 5 to support fetal development and the dog’s increased caloric needs
Veterinary confirmation of pregnancy and fetal count via ultrasound or X-ray
Deworming with fenbendazole during the last trimester, as some vets recommend, to reduce transmission of roundworms to puppies
Maintaining moderate exercise — short, gentle walks — through week 7, then allowing the dog to set her own pace
Avoiding all unnecessary medications, vaccines, and chemical exposures during pregnancy

Key Takeaways

Dog pregnancy lasts approximately 63 days from ovulation
Early signs of pregnancy in dogs appear around weeks 3 to 4
Fetal development is complete by week 7; the final two weeks are focused on growth and preparation for birth
A temperature drop below 99°F signals labor within 12 to 24 hours
Veterinary care — including ultrasound and fetal count — should be arranged before week 7
Switch to a higher-calorie food by week 5 and monitor the mother’s weight gain throughout