Animals are magnetic and have no menstruation. Why not

Animals are first divided into two large segments, one is invertebrates and the other is vertebrates, and vertebrates include fish, amphibians, reptiles, birds, and mammals. Mammals are the most evolved class, and females of mammals have both ovaries that are functional and fertilize in the body. The placental uterus has evolved from the primitive double uterus to the molecular uterus and the bicornuate uterus, and the higher animals have developed into a single uterus (apes, monkeys, and humans).

The placenta is formed by the combination of the fetus's chorion and allantois with the maternal endometrium. Placenta without decidua (including scattered placenta such as pigs, whales, etc., and felodes placenta such as sheep and other ruminants), and the endometrium does not fall off at birth. The decidual placenta (including annular placenta such as dogs, seals, etc.) and discoid placenta such as insectivores, pterocophalus, rodents, and most primates) is detached and causes massive bleeding.

Among mammals, only higher animals with a single uterus have menstrual phenomena, such as humans, apes, and monkeys (called the ape-like suborder). The protomonkey suborder, which also belongs to the primates, has a bicornuate uterus, so there is no menstrual phenomenon. The protomonkey suborder includes lemurs and slow loris.

Mammals all have periods and will breastfeed, but some are discharged in the body.

Never trust an animal that bleeds for a week and doesn't die.

It's not that we don't have any, it's that we can't see that they are not ...... structure like ours

The so-called "menstruation" is the periodic ovulation activity that will go through every month, which is unique to primates among mammals, so monkeys and orangutans have it. The ovulation process of other animals is not once a month, so it is not called "menstruation"!

The menstruation of human women is one of the advanced characteristics of human beings, that is, there is ovulation every month, and there is the possibility of conception every month. Most mammals ovulate once a year, twice or three times, and the endometrium will shed and bleed before ovulation; Non-mammals do not have this phenomenon, which is related to the different species.

Because we're advanced animals, they're not.

Who says animals don't have ???

You can see that you don't have a female pet...

Animals also have them, like dogs.

That's a small part of the difference between humans and animals.

This is the difference between humans and animals.

How do you know that animals don't menstruate, and when other animals have menstruation, they clean up their own blood, and they can also replenish blood. Can you do it?

It's like an animal that eats its own placenta after giving birth.

That's the difference between humans and animals.

Yes, female mammals have it. My old dog still has menstruation. But it's not clear what their cycle is.

Animals also have menstruation, cats and dogs will have it, and it also bleeds, but not as much as the female **.

Yes, but few, because they can do what they want!

Yes, I saw it! Puppies have it.

How much blood does the elephant have to leave when it comes to the big aunt?? Isn't it possible for whales to dye the sea red??

Some of them, like cats, seem to come only once a year.

I'll tell you for sure, mammals have it.