In medicine, etiology refers to the many factors coming together to cause an illness. It is normally the focus of epidemiological studies. The etiology of scurvy is a good example. With scurvy, sailors going to sea often lacked fresh vegetables.
So, how long are dogs pregnant? The answer varies depending on several factors, but the average length of gestation, aka pregnancy, lasts between 58 to 67 days, with 63 days being the average delivery date.
A dog goes into heat normally every 6 months. A dog is pregnant for approximately 2 months (58-63 days). Once the dog has puppies, she will go into heat again in approximately 4 months after that.Please do not breed your dog again.For her own health, have her Spayed ASAP! dog goes into heat normally every 6 months. A dog is pregnant for approximately 2 months (58-63 days). Once the dog has puppies, she will go into heat again in approximately 4 months after that.