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.
If you are doing it just to verify pregnancy, fetal heartbeats can be detected at 25 days. Ultrasound is not reliable for determining how many puppies. Puppy number and size is done by x-ray at about Day 50. An experienced vet can verify pregnancy in a small dog by palpitation (feeling) between 20 and 30 days.After 30 days it isn't possible.ating Newest Oldest. Best Answer: Well, you can spend the couple hundred dollars to get an ultrasound, to tell if you she is pregnant or not. A cheaper and just effective option is to simply wait. An ultrasound wont work until about 1 month after conception.