German Shepherd females usually have their first heat cycles starting anywhere from 6 months to 12 months of age. The heat cycle will last about 21-28 days and there are roughly two heat cycles per year. There are three stages of heat: proestrus, estrus, and anestrus.
Dogs in the proestrus stage may show some physical changes such as swelling of the vulva and bleeding from the vulva, but they are not yet receptive to mating. This stage lasts for 9-13 days.
Estrus is the second stage of the heat cycle and is when the female is most receptive to mating. Physical changes during this stage include swollen vulva and increased bleeding from the vulva. This stage lasts for 4-13 days.
The third and final stage is called anestrus, during which there are no visible physical changes or receptivity to mating behavior shown by the female dog.

At what age do German Shepherd females typically have their first heat cycle?
German Shepherd females typically have their first heat cycle between 6 months and 12 months of age. The heat cycle lasts 21-28 days and there are three stages: proestrus, estrus, and anestrus.
The first stage, proestrus, is when the female’s body prepares for ovulation. During this time, the female may exhibit some behavioral changes such as increased urination (to mark her territory), restlessness, and aggression.
The second stage, estrus, is when the female is actually in heat and receptive to mating. This stage lasts about 9-10 days. During this time, she will be more affectionate towards people and other dogs.
The third stage, anestrus, is the period after estrus where the female’s body returns to normalcy. This typically lasts about 60-90 days before another heat cycle begins again.
How long does a German Shepherd heat cycle last?
A German Shepherd female’s heat cycle lasts approximately 21-28 days. During this time, she will go through the first two phases of heat, known as proestrus and estrus. During these phases, she will bleed and be ready to breed.
The first phase of a German Shepherd’s heat cycle is called proestrus. This phase lasts anywhere from 9 to 17 days, during which the dog will experience swelling of her vulva and bloody vaginal discharge. She may also be more aggressive than usual during this time.
The second phase of a German Shepherd’s heat cycle is called estrus. This phase typically lasts between 3 and 21 days, during which the dog will have little to no vaginal bleeding and her vulva will return to normal size.
How many heat cycles does a German Shepherd have per year?
German Shepherd females usually have their first heat cycles starting anywhere from 6 months to 12 months of age. The heat cycle will last about 21-28 days. There are roughly two heat cycles per year. German Shepherds can have up to three litters in a single year, with each litter consisting of six to eight puppies.
What are the three stages of the German Shepherd heat cycle?
German Shepherd females have their first heat cycles starting anywhere from 6 months to 12 months of age. The heat cycle will last about 21-28 days and there are roughly two heat cycles per year. There are three stages of the German Shepherd heat cycle: proestrus, estrus, and anestrus.
The first stage, proestrus, is when the female’s body is preparing for ovulation. During this time, her vulva will swell and she may have a bloody discharge. She will also be attracted to males, but will not allow them to mate. This phase lasts 9-11 days.
The second stage, estrus, is when the female is ready to mate. Her vulva will be swollen and she will have a clear or straw-colored discharge. She will be very receptive to males during this time and may even stand still to allow them to mount her. This phase lasts 4-5 days.
The third stage, anestrus, is the resting phase between heat cycles When a female enters anestrus, her body begins preparing for the next heat cycle by producing follicles on her ovaries that contain eggs.
Frequently Asked Questions
How long do German shepherds bleed in heat?
Heat usually lasts 2-4 weeks in German shepherds. Some female dogs may not be receptive to male dogs at the beginning of the cycle, although some are receptive throughout. The cycle is over when the vulva returns to its normal size and there is no more bleeding or discharge.
How do you know when a German Shepherd goes into heat?
A German Shepherd goes into heat when its vulva swells and it starts to discharge blood or straw-colored fluid. The dog becomes more receptive to male dogs, licks its genital area more frequently, and may behave agitatedly or aggressively. Other signs that a German Shepherd is in heat include urinating more frequently and changing the position of its tail.
What do I do when my German Shepherd is in heat?
When your German Shepherd is in heat, it’s important to keep her engaged and distracted. This can be done by providing her with plenty of toys and activities to keep her occupied. It’s also important to keep her away from male dogs if you don’t intend to breed her. This can be done by keeping her in a separate area of the house or yard, or by using a leash when taking her outside.