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My pregnant dog mated multiple times. How do I calculate her due date?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | unspayed | 10 months and 27 days old

Hi when is she due her puppies I think she will be 8 weeks tomorrow but I’m a bit confused because of the different dates she mated first on June 30th and was kept with the male until July 3rd so I don’t know how many times she mated but this is starting to confuse me is she 8 weeks tomorrow??

1 Answer

Most Helpful Answer

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Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on August 24th, 2018

She could be 7 or 8 weeks pregnant. There can be a wide range of expected due dates if there was not bloodwork to pinpoint when Coco ovulated. You can start taking her rectal temperature twice a day to help you watch for when she could go into labor. Her temperature may drop a degree or two 12-24 hours before going into labor. Here is some more information on whelping: https://veterinarypartner.vin.com/default.aspx?pid=19239&id=4951546

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