Dog Science: Where does dog menstruation come from?

Where does the dog’s period come from? The liquid during your dog's menstrual period will flow out from the surface of the peach. The peach is the dog's uterine opening. Each time she has her period, the peach will expand, allowing the liquid to flow out.

The bleeding phenomenon in dogs is the mucus infiltrated from the uterine epithelial cells, which is to indicate that mating can occur at this time and that the dog is ready for pregnancy. When a dog goes into heat for the first time, it is actually not suitable for pregnancy because its body is not fully developed yet.

Dog vaginal bleeding occurs during the pre-estrus period. During this period, in addition to bleeding, the dog will also experience vaginal redness, swelling of the vagina, frequent licking of the vagina, excitement, loss of appetite, frequent urination, emotional instability, and increased aggression. When the dog's menstrual period ends, it will usher in the estrus period, which is the time for pregnancy.