Menstruation is a cycle that happens every month in women before menopause. But other than humans, it turns out there are other female mammals who also menstruate.

Basically, only humans and great apes (gorillas, orangutans, chimpanzees and bonobos) thatreally shows the menstrual cycle. But the truth of other mammals also experiencemenstruation. Only, menstruation in other mammals do not like menstruation in humans.

Reporting from Madsci, Friday (10/29/2010), several species of menstruating monkeys,lemurs, horses, buffaloes, giraffes, zebras, rhinos, cats, dogs, rats trees, elephants,porcupines and wolves.

In humans, the uterine wall entirely due to the absence of fertilization is characterized bybleeding that typically lasts 3 to 7 days. On average during the human menstrual blood loss of10-80 mL.

In humans, the average menstrual cycle occurs approximately 28 days, although it is generally accepted, but not all women have the same menstrual cycle, sometimes the cycle occurs every 21 days to 30 days.

While the great apes belong to regular menstrual cycles. Menstrual cycle length varies, an average of 29 days to 37 days in orangutans and chimpanzees.

Unlike humans and great apes, the process of menstruation in other mammals can be said to be ‘silent’, because the decay process of the uterine lining (endometrium) which is characterized by bleeding it is not externally visible or invisible.

When not fertilized, the uterus will absorb the uterine wall so that no bleeding. There areseveral memalia who experienced bleeding, but bleeding is relatively mild and very short, somany people who do not know.

Other mammals also do not menstruate regularly every month, but only a few times a year