French Dou's belly can be obviously enlarged only 3-4 weeks after pregnancy, which is about 35 days. At this time, it is basically in the middle stage of pregnancy. You can see that the nipples are obviously reddened and more prominent, and the belly is sagging. Moreover, dogs that are usually more active may prefer to lie down and be quiet after pregnancy. Some dogs may even vomit. By 45 days, you can basically figure out the number of puppies.