There’s a lot of nuance with dog pregnancy, so we’ve created this handy guide to help you navigate. The “heat season” begins around 6 months of age, on average, for unspayed female dogs.

Puppies grow up fast - and can get pregnant at a very young age, too. Here's what to know before you decide to spay your dog ...

First things first, though: let’s discuss the basics: Dogs can’t get pregnant all the time like other species. A non-spayed female dog’s “heat season” activates between 6 and 36 months ...