How to know that your dog is pregnant

First , If you saw your dog mating , this is easy ... count 62 to 64
days and expect the delivery at that time

If you didn't , It couldn't be noticed for about 6 weeks after then you can detect :
1- Swelling of the mammary glands
2- X- ray or Better Ultra-sound taken at the veterinarian will confirm pregnancy
3- The dog may move in circles searching for a place to give birth in.
4- Anxiety
5-Decreased appetite
6-A decrease in the dog body temp. may occur just before delivery
7-Your dog may wobble during walking
8-Tendency to sleep and stay in certain areas
9-Stomach enlargment
10-Putting your hands over the abdomen may let you feel the puppies moving