Sex

Preparation for mating occurs at the first stage of a female dog's reproductive cycle, known as proestrus. Hormones are released throughout this 9 to 10 day period, which causes changes in the reproductive system. A bloody vaginal discharge is a noticeable sign of proestrus. It is important to remember that mating should not be done at this time since the female may be aggressive if approached and is not yet receptive to the male.

After proestrus, the body enters the estrus stage, which is referred to as "heat." The female dog is at her most fertile and mating-ready at this time. A less reddish-brownish or even a clear or straw-colored fluid may replace the bloody discharge.

This stage is characterized by an increase in display of love, a readiness to let males approach, and the typical "flagging" activity, in which the female lifts her tail to reveal her vulva. This is the best time to breed your Zuchon if you're intending on doing so.

Metestrus is the next phase for the female after estrus and lasts for around 60 to 90 days. During this time, the body's hormone levels slowly go back to normal. A female won't become pregnant until mating has taken place; in that case, her body will start preparing for the next reproductive cycle.

Sexual inactivity between menstrual cycles occurs during anestrus, which follows metestrus. During this period, a woman's reproductive system may relax since there are no hormonal shifts or outward indicators of heat. Factors including age and individual traits determine the length of anestrus, which may range from a few weeks to a few months.