According to the Daily Puppy, the gestation period for dogs is typically around 63 days. However, a healthy dog pregnancy can range anywhere from 58 to 68 days depending on the dog.
Labradors, like any other dog breed, typically exhibit symptoms of labor up to a few days before giving birth. Symptoms of labor in Labradors can include restlessness, anti-social behavior and disinterest in eating solid foods. While these symptoms do not usually occur early in the pregnancy, observing a pregnant dog and taking note of any unusual behavior can help ensure that the dog does not give birth prematurely.