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.

People have shared personal stories of their dogs acting differently after they become pregnant. And while researchers don't have a definite answer about whether dogs can sense pregnancy ...

When the couple found out they were pregnant, the family dog attached itself to the wife. The behavior was out of character.