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.
Another way to determine pregnancy is to draw blood 22-27 days post breeding to measure the relaxin level in the bloodstream. The length of pregnancy in dogs is approximately 63 days. Milk production in the pregnant dog starts 1-7 days before parturition. Milk production can also be present in pseudopregnant dogs. During pregnancy a mucoid to pink tinged vulvar discharge can be present in normal dogs. Monitor for and report any bloody or yellow-green discharge as these can indicate serious disease.