Generally, from around the age of 6 months old, a female dog will experience her first heat cycle (when she reaches puberty).
During this heat cycle (i.e. estrous) there are four distinct phases, one of which is the estrus phase. During this phase she can become pregnant and this is when she will be “in heat”.
This cycle will continue for the rest of her life, unless she is spayed.
In this article we will explore the four stages of the estrous cycle and the symptoms associated with each stage.
We will also consider the health concerns associated with heat cycles and whether you can stop your dog coming into heat.
Your Dog’s Heat Cycle
Most female dogs have two estrus phases per year, meaning they will come into heat twice a year (i.e. monoestrous). The Basenji breed defies all explanation as they have one cycle per year.
What is it? Reproduction in Dogs
Estrus, or heat, is all part and parcel of a female dog’s reproductive cycle (i.e. estrous cycle). It is one part of the four stage cycle where she becomes fertile and receptive to mating with males: