Dog's Estrus Cycle

Generally speaking, the dog's estrus cycle has a certain sequence. , but this is because some dogs are in estrus once a year, while others are in estrus twice, and a small number of dogs may be in estrus three times a year. So different dogs require different treatment.

1. First love period

Dogs at 8 -The period of puberty can be reached at 12 months of age. However, due to the large differences in breeds, some dogs with smaller bodies will have puberty earlier than dogs with larger bodies.

2. Estrus season

Bitches are seasonal Animals that are in single estrus usually come into estrus once from March to May in spring or September to November in autumn. Dogs with good breeding conditions have less obvious seasonal estrus. Some dogs can go into heat 2-3 times a year.

3. Estrus cycle

The estrus cycle of female dogs It is divided into 4 periods, namely proestrus, estrus, interestrus and postestrus.

1. Proestrus: The period from which the female dog’s vaginal canal eliminates blood-like mucus to accept the male dog’s climbing and mating. The period of proestrus can last for 3-16 days, with an average of 9 days. During this time, the female dog is agitated, but does not accept mating, the external genitalia is swollen, and the ovaries have follicle development.

2. Estrus period: It is the period when the female dog accepts the process of climbing. The estrus period of female dogs generally lasts 4-12 days. Usually 9-12 days. The first time a female dog receives a male dog is a sign of the onset of estrus. Determining when estrus starts is very important, because ovulation will occur within a short period of time after estrus.

3. Estrus period:This is the period of time between when the female dog becomes emotionally restrained and when her reproductive organs return to their normal position. The estrus period of female dogs is relatively long. This is because the corpus luteum function of non-pregnant dogs can be maintained for about 75 days after ovulation.

4. Post-estrus: The female dog’s genitals are in a state of cessation, lasting 50-60 days, and the dog is in estrus only once a year. Dog, this period continues for nearly 1 year.

In every complete estrous cycle of a female dog, the uterus is in a state of progesterone for a long time, which can cause excessive endometrial hyperplasia and cystic changes, and also It is extremely easy to cause symptoms. This phenomenon is more common in older dogs.

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