How come other animals don't go through menstrual periods like humans do?

Question

How come other animals don't go through menstrual periods like humans do?

Answer 1

Most animals are only fertile during certain times of the year, when conditions in that organism's environment are favorable for conception. This type of cycle is known as a estrus cycle and it allows for the birth of offspring when they are most likely to survive outside the womb. Cycle variability also differs among species, but typically cycles are more frequent in smaller animals. Even within species significant variability can be observed, thus cats may undergo an estrous cycle of 3 to 7 weeks. Domestication can affect estrous cycles due to changes in the environment.

Answer 2

Many do.

Answer 3

Well, they are other animals and not human, but many animals specialty mammals go thru the same process with many similarities.  

Answer 4

humans are the most developed organisms.thei structure and function is very complicated.they have to give birth to the same organism which is also developed .this process needs a lot of biochemical process and the menstrualperiods are one of the process