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.
The quickest way to tell if the dog is pregnant is to take the dog to a vet and have blood drawn. It is VERY important to do this as sometimes what you may think is a pregnancy is a closed Pyometria, which can of cousre kill the bitch and is an automatic spay.