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.
How Long Do Dogs Stay Pregnant? According to Pets Web MD, the gestation period for most dog breedâs lasts between 58 and 65 days. Itâs easy to confirm that your dog is pregnant by using an ultrasound or taking a blood test.