Non-spayed female dogs will go into "heat" or estrus usually twice a year, starting at 6-12 months of age. There are four stages of the canine estrus cycle: proestrus, estrus, metestrus, anestrus.
During proestrus, there will be vaginal bleeding. During estrus, the vulva will be swollen, vaginal discharge is more yellowish, the female will accept males and conception can occur.
Jul 30, 2015 ... There's a relatively small window when your dog is most fertile during the heat
cycle; it may begin about nine or ten days after she goes into ...
According to Webvet.com, small dogs come into heat sooner than larger breeds.
Typically she will have two estrus cycles, or heats, a year, and each one lasts ...
There are four stages to the canine estrus cycle: Proestrus: vaginal discharge,
males attracted to females, females unwilling to mate. Length: 4-20 days. Estrus:
How often do female dogs come into heat? How long does a "heat" cycle or
oestrus last? What are the signs of "heat"? How soon after a cycle can she be ...
Sep 18, 2015 ... When a female comes into her dog heat cycle, or season, her body is ... from 5 to
21 days each, the length varies greatly between individuals.
Jul 16, 2015 ... Instead, their heat cycles gradually stretch out in length. A dog's heat cycle
consists of four stages: proestrus, estrus, diestrus and anestrus.
May 16, 2011 ... Dogs will have their first estrus cycle when they reach puberty. Estrus is the stage
of the reproductive cycle in which the dog can become ...
Jan 4, 2014 ... The heat cycle has three distinct stages. They include: ... The vulva will also swell
and the dog may urinate more frequently. This stage may last ...
Understanding a female's heat cycle can help you prepare for a breeding or
prevent an unwanted litter. Find out how the cycle works and how to spot when a