With a population of about 100 million people, the Philippines is the seventh-most populated country in Asia and the 12th most populated country in the world. An additional 12 million Filipinos live overseas, comprising one of the world's largest diasporas.
The Reproductive Cycle in Dogs. In order to answer the question, how long are dogs pregnant, you first need to understand the dog reproductive cycle. Intact female dogs go into heat approximately every six months, although this can vary depending on the dog and the breed. The heat cycle lasts 18-to-21 days and is broken into four distinct stages.
She's Starting to Show. Your vet can confirm whether your dog is pregnant when she's about 3 weeks through the gestation period. At that point, an ultrasound should be reliable. Your vet can palpate the dog to feel for puppies a month after the last breeding took place. From the sixth week on, your dog's abdomen starts to enlarge.