Here, then are Kepler's Three Laws of Planetary Motion: Kepler's first law states all planets move in elliptical orbits with the Sun at one focus and the other focus empty. Applied to Earth satellites, the center of the Earth becomes one focus, with the other focus empty. For circular orbits, the two foci coincide.
Asker's rating. Report Abuse. If the dog has been bred at the right time of her cycle, she gets pregnant immediately and the pregnancy lasts around 61 days, give or take 3-5 days. Most dogs go into season twice a year and are fertile for about a week in the middle of a 3 week heat period. Source(s): DVM 29 years. angeloneus Â· 4 years ago. Thumbs up.
Confidence votes 3.8K. Pregnancy in a female dog lasts nine weeks. We determine the birthing date from the date of the first mating. Some bitches will whelp (deliver their puppies) anywhere from day 59 to day 63. As the owner, you will make no changes to her diet for the first 5 weeks. Often, in the 3rd week after mating, she will go off her food for about 10 days.