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.
A dog may not show any signs of pregnancy in the first 2-3 weeks (which is the first third of the pregnancy). Her appetite should remain normal. Pregnant female dogs absolutely do suffer from morning sickness like people do, however not until approximately day 21 after being mated. It usually lasts 1-2 weeks. Also on day 21, you can look at your female's gums. If the mating took, her gums will be white instead of the normal pink.