Dog Pregnancy Calculator
Pregnancy Timeline Estimates
Estimated Due Date:
(Note: Most dogs deliver between 58 and 68 days after breeding, with 63 days being the average.)
Key Milestones:
- Abdominal Swelling: Around
- Puppy Movement Visible: Around
- Switch to Puppy Food: Around
- Nesting Behavior Starts: Around
How Long is a Dog Pregnant?
The average gestation period in dogs is approximately 63 days (about 9 weeks), although this can vary between 58 and 68 days. Because sperm can live for several days inside the female, and eggs can remain fertile for some time, the exact date of conception doesn't always match the date of breeding.
The Stages of Canine Gestation
Dog pregnancy is divided into three trimesters, each lasting about 21 days:
- First Trimester: Embryos travel to the uterine horns. You may notice "morning sickness" or personality changes around week 3.
- Second Trimester: The fetuses begin to develop recognizable features. This is when the mother's weight gain becomes noticeable.
- Third Trimester: Rapid growth occurs. By day 50, you may see the puppies moving under the mother's skin.
Signs Your Dog is Going into Labor
As the estimated due date calculated above approaches, watch for these signs of Stage 1 labor:
- Temperature Drop: A dog's rectal temperature usually drops below 100°F (37.7°C) about 24 hours before labor begins.
- Restlessness: Pacing, digging, or trying to hide in a "nest."
- Loss of Appetite: Many dogs stop eating 12-24 hours before delivery.
- Vomiting or Shivering: Normal hormonal responses to the onset of labor.
Example Calculation
If your dog was bred on January 1st, the estimated 63-day due date would be March 5th. You should begin preparing the whelping box and increasing the mother's caloric intake (usually with high-quality puppy food) around the 5th week of pregnancy (roughly February 5th).