After how many days after mating does a dog's heat end if she is pregnant? - briefly
If a female dog becomes pregnant after mating, her estrus (heat) cycle typically ends around 10-14 days after ovulation, which usually occurs within 48 hours of mating.
After how many days after mating does a dog's heat end if she is pregnant? - in detail
When a female dog, or bitch, goes into heat, it typically lasts for about 18-21 days. This period consists of two main phases: proestrus and estrus. During proestrus, the bitch experiences vaginal bleeding and attracts male dogs, but she is not yet receptive to mating. The estrus phase, also known as standing heat, occurs when the bitch becomes receptive to males and is ready for breeding. This stage usually lasts for about 9 days.
If a bitch becomes pregnant during her heat cycle, several hormonal changes occur that can affect the duration of her heat. The primary hormone responsible for maintaining pregnancy in dogs is progesterone, which is produced by the ovaries after ovulation. Progesterone helps to support the developing embryos and prevents further heat cycles until the puppies are born.
Once a bitch becomes pregnant, her body begins to produce progesterone to sustain the pregnancy. This hormonal change can cause the bitch's heat cycle to end earlier than usual, typically around 7-10 days after mating if she has successfully conceived. The exact duration may vary depending on individual factors such as the bitch's age, overall health, and specific hormone levels.
In summary, if a dog becomes pregnant during her heat cycle, the heat will usually end sooner than the typical 18-21 days. Pregnancy hormones like progesterone play a crucial role in ending the heat cycle early to support the developing fetuses. The exact timing can vary, but it typically occurs around 7-10 days after successful mating.