Choose the date you are counting from and see the expected due date and window.
A dog mated on 1 October is expected to whelp around 3 December, 63 days later, with a window of about 4 days either side. Counting from the LH surge instead, the figure is 65 days, and the window is tighter because the date is more exact.
| Counting from | Days | Window on this page |
|---|---|---|
| Mating | 63 | 4 days either side |
| Ovulation | 63 | 2 days either side |
| LH surge | 65 | 1 day either side |
If there was more than one mating, use the first. The window is wider because mating is not ovulation.
Choose a date and the expected due date appears here.
This is general information and arithmetic. It is not veterinary advice. Speak with your vet about your own pet.
due date = starting date + 63 days (mating or ovulation) or + 65 days (LH surge)
Pregnancy in the bitch is reported as 63 plus or minus 2 days from ovulation and 65 plus or minus 1 days from the LH surge.
due date plus or minus 4 days
A dog can mate days before or after she ovulates, so a mating date is a looser starting point than an ovulation date. The extra 2 days either side, on top of the reported 2, is this page's own choice and is not from the source.
Plan ahead for the weeks when you will be busy at home. Find a local boarder or puppy school for after the litter arrives.
