The Short Answer: Around 63 Days
Dog pregnancy lasts approximately 58 to 68 days, with 63 days being the average. That is about nine weeks. Unlike human pregnancies, the exact timing can be tricky to pin down because ovulation and fertilization do not always happen at the same time as mating.
The most accurate way to track is from ovulation date, which a vet can confirm through progesterone testing. If you are counting from the mating date, use 63 days as your baseline but stay ready a few days either side.
What Happens Week by Week
The first three weeks of pregnancy are mostly invisible. Your dog will not look or act much different. The embryos are small and implantation is still underway. Some dogs experience a mild decrease in appetite in week two or three, similar to morning sickness.
By week four, a vet can usually confirm pregnancy through ultrasound and may be able to give you a rough pup count. Your dog's belly will start to look noticeably rounder. Her appetite will likely increase and her nipples will become more prominent and pinker.
Weeks five through seven bring the most visible changes. The belly grows significantly, movement becomes more careful, and nesting behavior may start. She will probably eat more and need smaller, more frequent meals as the pups take up space.
In the final week or two, you may actually be able to feel or see the puppies moving. Your dog will start nesting more intensely and may become restless. A temperature drop below 37.5°C about 24 hours before labor is a reliable sign that delivery is close.
| Week | What is Happening | What You Might Notice |
|---|---|---|
| Week 1 to 2 | Fertilization and early cell division | Nothing visible |
| Week 3 | Embryos implant in uterus | Mild appetite change possible |
| Week 4 | Heartbeats detectable by ultrasound | Belly rounding, nipple changes |
| Week 5 to 6 | Rapid fetal growth | Clear belly growth, more appetite |
| Week 7 to 8 | Puppies nearly fully formed | Nesting, movement visible |
| Week 9 | Labor approaching | Restlessness, temperature drop |
Feeding a Pregnant Dog
Nutrition during pregnancy matters more than most people realize. For the first four to five weeks, your dog does not need dramatically more food, just good quality food. Overfeeding early on can cause excessive weight gain that complicates delivery.
From week five onward, gradually increase food by about 10% per week until she is eating roughly 50% more than normal by the time she is ready to give birth. Fresh, high-protein food is ideal. Puppies develop rapidly in the final weeks and the mother needs the nutrients to support that.
Vet Visits During Pregnancy
If you know your dog is pregnant, get a vet check around week four to confirm the pregnancy, check her overall health, and discuss what to expect. A second check in weeks six or seven can give you a better pup count and help you prepare for whelping.
Make sure her vaccinations are up to date before pregnancy if possible, because some vaccines cannot be given during pregnancy. Also discuss deworming, as worms can be passed to puppies.
Preparing for the Birth
Set up a whelping box in a quiet, warm area about two weeks before the due date so your dog can get used to it. The box should be big enough for her to lie stretched out, with low sides she can step over easily but puppies cannot climb out of.
Have clean towels, a heating pad set on low, and your vet's emergency number ready. Most dogs manage labor and delivery without help, but it is good to be prepared and present for the whole process.
