Menstruation is rare in the animal kingdom, but some species do experience it. When we think about menstruation, the first thing that usually comes to mind is humans. However, did you know that there are some animals that also go through a similar process? Menstruation is the regular shedding of the uterine lining in females when a fertilised egg does not implant. This process is common in humans but quite rare in the animal kingdom. In most animals, the reproductive cycle does not involve menstruation. Instead, they reabsorb the uterine lining if pregnancy does not occur. However, a small num…