Navy vs Marines. There are several branches that make up the United States armed forces. They are the Army, Navy, Marine Corps (marines), the Coast Guard and the Air Force.
Canine Parturition/Whelping. The best way to know when the dog is going to whelp is to have ovulation timing and specific hormone and breeding dates. Often we do not have that information, and since the average gestation is 63 days but can be between 57 to 72 days from a single breeding, it can be difficult to tell when the dog is going to whelp. Canine parturition/whelping occurs in 3 stages. The first stage is when the uterus begins to contract and cause the cervix to dilate. Stage one can last 6 to 12 hours in the dog. Signs that you may see in the female are restlessness, panting, pacing, or nesting type behavior.
Stages Of The Canine Heat Cycle. Your dog will go through four stages in her reproductive cycle. 1. Proestrus: The first stage is proestrus. This stage generally lasts seven to nine days but it could be as short as three days or as long as two weeks. This is when the red discharge occurs and the vulva starts to swell. The female will squash any interest by male dogs at this point. 2. Estus: The next stage is true estrus. This is when your female dog is fertile. Generally, this lasts about a week. During this time, your female will stand and âflagâ her tail to the side for a male to mount her.