Why do most animals have estrus, but humans do not, but 'hide' ovulation?
Introduction: From the beginning of the birth of the earth to the present, a lot of life has been bred on the earth, and there are representative creatures on the terrain at each stage, and now the representative creature of the earth is human beings. Compared with other animals, in addition to having a high IQ, humans are also very different from other animals in other aspects, such as reproduction.
Generally, many animals have a fixed estrus period, such as our common cats and dogs. Generally, animals in estrus are mammals, but humans, as a kind of mammals, do not have estrus.
For living things, survival and reproduction are very important, and humans are no exception. Generally speaking, in the eyes of animals, mating is mainly for the continuation of offspring. Maybe human mating is relatively simple, but for animals, the reproduction process is very difficult. Because many animals are "threatened" by natural enemies, and there is very little food to eat in seasons such as winter, reproduction is difficult.
Female animals are the main "labor force" for reproduction, so after they are pregnant, they will find a lot of food for nutrition and energy supplementation. And the actions of female animals will be affected after pregnancy, which also causes female animals to become very dangerous when pregnant, so in order to reduce the harm during pregnancy, and also in order to adapt to changes in the environment, general animals will choose the best reproduction. timing for future generations.
When an animal chooses to give birth to offspring, the food should be more abundant at this time, and the living environment in which it is located is also relatively safe, because this can ensure the smooth survival of the cub. The most suitable time period for gestation is generally estrus, so most animals will mate during estrus, and after the end of estrus, animals will not accept mating.
Generally, the estrus period mainly refers to female animals, because most of the time male animals need to be determined by female animals for mating. When the animal enters the estrus period, the sex hormones in the body will be greatly increased, and the smell emitted by the animal will also produce a "craving" for the opposite sex, and the female animal after entering the estrus period is also in the active period of ovulation. The animals are doing "homework" for mating in various aspects, such as sound, smell, sight, etc.
The reason why humans do not have estrus is mainly related to the living environment of human beings. First of all, human beings have gradually become the "top" of the food chain through evolution, so there are no "natural enemies" in general. Humans have a way to create food, and humans are not picky eaters, so humans are not short of food all year round, so there is no need for a fixed estrus period.
For most animals, the estrus period is the ovulation period. Animals mate mainly to reproduce offspring, while human copulation is not necessarily to reproduce offspring. That is to say, humans do not necessarily have to mate when they ovulate, or humans do not necessarily ovulate when they mate. As for why human females hide their ovulation period, and unlike animals, this is mainly because animals have a polygamous system, while humans do not.
Many animals have male leaders, and after the death of the ambitious leader, the previous leader will kill the cubs. Therefore, this "cruel" behavior also causes the female to gradually hide the ovulation period. Human beings are generally monogamous, so in order to ensure that the child is his own, males more often only mate with one female, the female takes care of the child in the family, and the male provides food and protection for the offspring Wait.
Males mainly provide food and protection for the family, while female animals gradually hide the ovulation period in order to maintain this status quo, so this is also the basis of human monogamy.