In humans, a woman’s uterus is prepped for pregnancy each month. However, when a pregnancy does not occur, the uterus sheds its lining and releases blood and soft tissue. On average, this occurs once every 28 days and is known as menstruation.
It can be difficult to deal with monthly bleeding as well as the fluctuations in associated hormone levels. Female dogs maybe a little bit luckier in that respect because they do not cycle as often as humans do! What are some of the other differences and similarities between human and dog “menstrual” cycles?