Pugs are pregnant for an average of 63 days, according to Pet Pug Dog; however, a normal pug pregnancy can last anywhere from 60 to 65 days. Pugs that are pregnant for longer than 67 days need medical attention.
According to the Pets United Group, loss of appetite, mood changes, decrease in physical activity and nipple growth are all signs of early pregnancy in pugs. As the pregnancy progresses, the pug's appetite increases and she gains weight. The day before she goes into labor, the pug's temperature decreases to 98 degrees Fahrenheit. On average, pugs give birth to three puppies per litter, according to Go Pets America.