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 are dogs pregnant? Canine gestation is 63 days, which is exactly 9 weeks. However, just as in a human pregnancy, the 9 weeks is a guideline, rather than a date set in stone for your dogâs gestation. Regardless of their size or breed, all canine pregnancy length is the same.