Do animals, reptiles and birds have periods ( menstruation )like human has?

Answer 1

Menstruation is a characteristic of placental mammals. It is a process where by the uterus gives off its unused inner layer because the egg was never fertilized. Birds and reptiles do not contain a uterus. They lay a hard shelled egg called the amniotic egg. Basically they leave the eggs alone to develop on their own. When they hatch they usually fend for themselves except for the birds that watch over their chicks.

Answer 2

Mammals do, if ever you have owned a femals cat, dog, ferret, and many others, you would know that they do have these mentrual cycles. Birds have them as well, chicken eggs are the result of the menstrual cycle. The eggs that we eat, as disgusting as it sounds are the eggs that are released during the regular mentrual cycle or a hen. They are unfertilized yet released. Im not so sure about reptiles however I have never heard of such a thing.

Answer 3

only mammals that have placenta. because it is actually shedding the tissue in uterus that should host the placenta. however, in some mammals u obsserve next to nothing and also remember that in some mammals it goes with the fertile parts of the cycle, not infertile like in humans. hope that it helps

Answer 4

Do Lizards Have Periods

Answer 5

I don't know about all animals,but my little female dog has periods: She comes in heat,and because she does not get PG she sheds the blood from her uterus:

Answer 6

Dogs and cats will spot when they are in heat

Answer 7

mammals have it for sure...

but i have a less details about others

Answer 8

mammals have eg. cow

Answer 9

other mammals do