Dog pregnancy lasts approximately 63 days (9 weeks) from ovulation, with a normal range of 58–68 days from the mating date. This dog pregnancy timeline walks the full nine-week arc week by week — fetal development milestones, the dam's changing signs, the vet-visit schedule, and the feeding adjustments to make at each stage — so you know exactly what to expect and when.
Use our dog gestation calculator to turn your dog's mating date into a personalized day-by-day countdown.
Just want the early signs? This page is the full week-by-week timeline — fetal development, vet visits, and feeding for all nine weeks. If you're trying to work out whether your dog is pregnant right now, start with our dog pregnancy symptoms guide.
9-Week Pregnancy at a Glance
Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Weeks 1–3
No visible signs
Weeks 4–6
Signs appear
Weeks 7–9
Whelping prep & birth
Week 1 (Days 1–7)
Fertilization
Puppy development: Mating occurs and fertilization happens within 24–72 hours. Fertilized eggs (zygotes) begin dividing as they travel from the fallopian tubes toward the uterus.
Signs & what to do: No external signs of pregnancy are visible at this stage. The dam behaves completely normally — any apparent calmness is a response to the mating itself, not the pregnancy. Avoid unnecessary medications, vaccines, or dewormers this week unless directed by your vet.
Week 2 (Days 8–14)
Embryo Development
Puppy development: The dividing cells form a blastocyst that enters the uterus. Cells continue to differentiate into the embryonic layers that will eventually form every organ system.
Signs & what to do: The dog shows no outward signs of pregnancy. Appetite and energy remain normal. Normal exercise and routine are fine — there's nothing to adjust yet.
Week 3 (Days 15–21)
Implantation
Puppy development: Embryos implant in the uterine wall around days 16–18. Each embryo is roughly 5–7mm in length by day 21, with basic body structure just beginning to organize.
Signs & what to do: This is a critical window — stress, poor nutrition, or illness can potentially disrupt implantation and cause early pregnancy loss. Still no visible physical signs, though a few dogs show the very earliest hint of nipple change by the end of this week — it's uncommon and easy to miss; most dogs won't show nipple changes until week 4. Minimize unnecessary stress or boarding.
Week 4 (Days 22–28)
Fetal Development Begins — First Vet Visit
Puppy development: Organ formation accelerates and heartbeats become detectable by ultrasound. This is the earliest reliable point for pregnancy confirmation, typically performed around day 22–25.
Signs & what to do: Some bitches experience mild morning sickness — reduced appetite, occasional vomiting — around day 21–28. It typically resolves on its own within 3–5 days; if vomiting is frequent or she refuses food for more than 24 hours, call your vet. Nipples begin to enlarge and turn a deeper pink ('pinking up'), often the first physical sign an owner notices — more obvious in first-time mothers, subtler in dogs that have had previous litters. Schedule your first vet visit and ultrasound this week.
Week 5 (Days 29–35)
Organ Development Accelerates
Puppy development: Eyes, toes, claws, and facial features begin forming. Amniotic fluid volume increases to cushion and support the developing puppies.
Signs & what to do: The abdomen begins to round noticeably for the first time — filling at the sides and lower abdomen first, a change that shows more clearly in lean or small dogs than in muscular or deep-chested breeds. Appetite typically rebounds and starts increasing. Start transitioning gradually to a high-quality puppy food or a diet formulated for pregnant and lactating dogs. Morning sickness, if it occurred, usually subsides by now.
Week 6 (Days 36–42)
Pigmentation and Coat Begin
Puppy development: Puppy skin pigmentation develops and early hair follicles begin forming. Skeletal structures continue calcifying, though not yet enough to show clearly on X-ray.
Signs & what to do: The abdomen continues enlarging — by day 42 it is obviously larger to anyone familiar with the dog's normal shape, and ribs may become harder to feel through the body wall. Nipples and mammary glands enlarge significantly and may feel firmer. Appetite increases further. Maintain gentle exercise but avoid strenuous activity or jumping. A clear vaginal discharge, without odor or blood, is normal at this stage.
Week 7 (Days 43–49)
X-Ray Puppy Count — Set Up Whelping Box
Puppy development: Fetal skeletons calcify enough to be clearly visible on X-ray from around day 45 onward, making this the single best window for an accurate puppy count.
Signs & what to do: The dam's abdomen is now clearly and significantly enlarged, and puppy movement may sometimes be visible from outside. This is the start of the most rapid fetal growth phase — roughly two-thirds of each puppy's birth weight is gained in these final two weeks. Introduce the whelping box this week and encourage her to start sleeping in it, so it feels familiar by the time labor begins.
Week 8 (Days 50–56)
Pre-Whelping — Begin Temperature Monitoring
Puppy development: Puppies are essentially fully formed now and spend this week putting on the bulk of their remaining birth weight. Movement becomes more vigorous and easier to feel or see.
Signs & what to do: Begin taking the dam's rectal temperature twice daily starting this week — a dog's normal temperature is 101–102.5°F (38.3–39.2°C), and a drop below 99°F (37.2°C) signals that whelping will occur within roughly 12–24 hours. To feel puppy movement, place a hand gently on her lower abdomen while she lies on her side and wait for the subtle rolling or pushing sensation — don't press firmly, which can stress the fetuses. Nesting behavior may begin, typically 7–10 days before whelping (around day 53–56), and her appetite may drop in the final days. Move her to the whelping area full-time and limit unnecessary stress or visitors.
Week 9 (Days 57–65)
Whelping
Puppy development: Puppies are fully developed and ready for birth. Each is typically delivered still inside or just after passing through its individual amniotic sac, which the dam breaks and cleans away herself.
Signs & what to do: Stage 1 labor begins with restlessness, panting, shivering (from the temperature drop and early contractions), and continued nesting, while vaginal discharge increases to a heavier, cloudy mucus. Many dogs stop eating entirely in the 12–24 hours before active labor. Stage 2 (active delivery) follows once strong, visible contractions start. Puppies are usually delivered 15–60 minutes apart. Watch for stuck puppies or stalled labor — if more than 2 hours pass between pups with continued straining, or the dam seems exhausted without progress, call your vet immediately.
The Three Canine Pregnancy Stages
Veterinarians typically describe the canine pregnancy stages in three broader phases, which map onto the nine weeks above:
Pre-embryonic stage (days 1–21 / weeks 1–3): Fertilization, cell division, and implantation. No outward signs are visible, and this is also the highest-risk window for early pregnancy loss if the dam is stressed, poorly nourished, or exposed to certain medications.
Embryonic-to-fetal stage (days 22–45 / weeks 4–6): Organs form, the pregnancy becomes detectable by ultrasound, and the first physical signs — nipple changes, morning sickness, and a visibly rounding abdomen — appear in sequence.
Late fetal stage (days 46–63 / weeks 7–9): Rapid growth, an accurate puppy count via X-ray, whelping box setup, temperature monitoring, and finally labor itself.
Feeding Adjustments Week by Week
During weeks 1–4, maintain normal feeding — puppies gain only a small fraction of their birth weight before this point, so extra calories aren't yet needed. From week 5 onward, gradually transition to a high-quality puppy formula or food for pregnant and lactating dogs. Expect measurable weight gain from mid-pregnancy: most pregnant dogs gain 15–25% of their pre-pregnancy body weight over the full gestation, with most of that gain in the second half. By the final week of pregnancy, the bitch should be eating roughly 25–50% more than her normal maintenance intake, often split into smaller, more frequent meals as the enlarged uterus leaves less room for a large meal at once. Avoid calcium supplementation during pregnancy — excess calcium can paradoxically increase the risk of eclampsia (milk fever) after whelping.
Whelping Box Setup
The whelping box should be:
- Large enough for the bitch to stretch out fully
- Lined with whelping pads or clean towels (not loose bedding that can suffocate pups)
- Fitted with a pig rail (a low bar around the perimeter) to prevent the bitch from crushing puppies
- Placed in a quiet, warm, low-traffic area
- Kept at 85–90°F (29–32°C) for newborn puppies (use a heat lamp on one side only so pups can self-regulate)
Introduce the box during week 7 so the dam has time to get comfortable with it before labor begins — a box introduced only days before whelping is more likely to be rejected in favor of a closet, under a bed, or another spot she chooses herself.
Signs of Normal vs. Problem Whelping
Normal: Puppies arriving 15–60 minutes apart, the bitch cleaning and nursing each pup promptly, and visible green or dark discharge after each puppy as the placenta passes.
Call the vet if: More than 2 hours pass between puppies with continued contractions; the bitch appears exhausted and is pushing without result; a puppy appears stuck in the birth canal; more than 30 minutes of active, visible straining occurs without delivery; or you notice foul-smelling discharge at any point.
What to Expect After the Last Puppy
Once whelping is complete, the dam should pass a placenta for each puppy delivered — count them if you can, and mention any discrepancy to your vet. Puppies should locate a nipple and begin nursing within the first hour or two; nursing within this window is how they receive colostrum, the antibody-rich first milk essential for early immune protection. A follow-up vet visit within 24–48 hours of whelping is a good idea to confirm the dam has fully delivered (no retained puppy or placenta) and that all puppies are nursing well.
For a closer look at each symptom in isolation — and how to tell real pregnancy signs from false pregnancy — see our guide to dog pregnancy symptoms. For more on dog gestation generally, see our dog gestation calculator page, or compare with other species on our gestation periods chart.
Sources & References
- American Kennel Club — Canine breeding and whelping guidelines
- Merck Veterinary Manual — Canine reproduction
- Cornell University College of Veterinary Medicine — Canine gestation
- University of Minnesota Extension — Animal reproduction reference