Reproduction from the point of view of a woman

[Red, X-chromosome; green, Y-chromosome.](By Janice Y Ahn, Jeannie T Lee - Janice Y Ahn, Jeannie T Lee Retinoic acid accelerates downregulation of the Xist repressor, Oct4, and increases the likelihood of Xist activation when Tsix is deficient BMC Developmental Biology 2010, 10:90 doi:10.1186/1471-213X-10-90 http://www.biomedcentral.com/1471-213X/10/90, CC BY 2.0, Link)
Organisms, reproduction, according to the methods, is conditionally divided into two types: sexual and asexual. Asexual reproduction, describes the process when the body separates its part, which grows into an adult living organism being its copy. In this case, the process occurs without the participation of reproductive cells - gametes.

[Different forms of isogamy: A) isogamy of motile cells, B) isogamy of non-motile cells, C) conjugation.](By Original bitmap version by Tameeria, SVG version by Qef - Vectorised SVG version of http://en.wikipedia.org/wiki/Image:Isogamy.png, Public Domain, Link)
The concept of reproduction means the creation of a new organism. Life to exist forever, must be constantly updated. For this, the method of reproduction is used, when a new copy of the organism is created. If you want to be young, multiply such a motto of the cells.
Sexual reproduction occurs with the help of gametes (reproductive cells). Three kinds of gametes are known to man, and consequently, three methods of sexual reproduction. This is an isogamy when two identical cells merge morphologically and in size. Anizogamy, when cells differ not only in size. But still macrogametes can be not mobile, and microgametes, analogues of a human spermatozoon possess flagella and quickly move. And the third way is oogamy. This method is well known to us, since it is used by man in everything. In this case, capable of fusion gametes are sharply different both in size and mobility. Male gametes are spermatozoa, well, very mobile. Female - is an egg, it is not mobile.
If we were to reason from the position of evolution, then it is possible to assume that the development of gametes from simple to complex is due to evolutionary processes. In my opinion, the same opinion, all this division is arbitrary. This division, in size and speed of movement, I was not impressed and rather sucked from the finger. If we look at the isogamy in algae, then the process is briefly the following way. Gametes are released from the parent cell and fused by a tube, forming a resting zygosporum. When anisogamy, gametes merge morphologically different in size and they can be conditionally divided into male and female and they have different types of mating. I think this division is arbitrary.
In fact, all these processes have the same goal of crossing two different organisms, which increases the survival rate of the species. As it was planned by our creators. If we take a closer look at oogamy, then the egg has everything it takes to bring a new organism to light. At first glance it may seem that this evolution is developing the process of reproduction from isogamy to oogamy, made it so. Indeed, the process of creating an egg is not simple and costly, it has everything you need on your board to grow a new organism. Give only food for complete happiness. Male gametes in this case do not carry anything useful, except for a set of DNA, which in addition is a trigger and starts the process of growth of a new organism from one egg.
A little distraction and consider what constitutes a danger to life. By and large, there is nothing on the Earth that threatens life, on the contrary, all conditions for prosperity are created. Even weather cataclysms are not able to destroy life. For example, reproductive cells can be frozen, and plant seeds also do not lose their ability to rise. The main danger is one that can damage or change the genetic code that has gone all the way of life existence for 3 billion years and almost unchanged. It is natural to assume that the process of reproduction is designed to constantly update - to keep at a constant level, but always rewriting the code, which in turn creates the inability of any changes or violations, except in clinical cases. When the cell is multiplying, there is no old one, not new; two sisters appear, two copies, each containing one thread from the old DNA and one completely new thread, created by replication. During sexual reproduction, two different DNAs are crossed. What is planned and is the key to survival of the living.
What would have happened if a person did not reproduce sexually. The woman has everything necessary for the emergence of a new person: the egg, the place where the fetus grows, it is created to give birth, and it is created to raise, while the cub is helpless. For example, the trigger that triggers the process in the egg cell would be something else, maybe temperature or something else ... Of course, the sperm DNA is not only a trigger. Some of the genes in the egg and spermatozoa are turned off, which excludes the reproduction of same-sex DNA. If you cross the DNA of two spermatozoa, the embryo will grow an abnormal giant placenta, and if you simply cross the DNA of two eggs, the genes responsible for placenta formation will not be sufficiently active. But these genes are fully present in the female DNA, just turned off to support the cross-breeding process.
If the process of reproduction occurred only when two female DNAs were crossed, we would always get something like that. What could lead to the fact that the body is more predisposed to persistence and, consequently, to damage, for example, by any dangerous virus. When crossing between a man and a woman, one always gets a new one. Combinative variability. Each person is unique, although he inherits some of the characteristics from his parents. If only because we do not look the same.

[Mandarin ducks, male (left) and female (right), illustrating the dramatic difference between sexes](By © Francis C. Franklin / CC-BY-SA-3.0, CC BY-SA 3.0, Link)

As I said before, a woman is responsible for the continuation of the family. And that's what she needs more than a man. Because a woman chooses a man, not a man woman. The woman does this from the position of what will be a cub. Every woman wants to ensure that her baby was the best and could survive. It is very important. Initially, of course the best is recognized by the male, as it is said that the one who came first. Like fast sperm. But it may be that the first male who came running may not be the best option for future offspring. Perhaps it is worth creating a small gap between the first meeting and mating, in order to better consider the males, it is possible to choose from several and with better qualities. In this case, sexual selection becomes more difficult and involves not only sexual characteristics, but also the brain. To reach the woman's brain, you can use two methods. The first is a duel, where the strongest wins and the female chooses it. The second method is less bloodthirsty and consists in courting a woman. What can also lead to a man's success with a woman. The result of this behavior falls into the brain of women, in the anterior hypothalamus, which is responsible for the sexual behavior of the woman and is closely related to the parental behavior in the same place.
As for the man, in my opinion for the man the quantity is important, the more he can postpone the seed, the better. Rather, it is connected with this, the ability of a man to produce spermatozoa throughout his life. Of course with age, their speed is probably so great and the number decreases, but they are healthy and able to conceive a new offspring. The woman is endowed with a limited number of eggs, which are formed in the womb of the mother, and at a certain point they end.
In conclusion, a little Freud. Freud believed that members of one family have a natural sexual attraction to each other, which causes society to impose a taboo on incest, and Westermarck proceeds from the opposite view that taboo occurs naturally and spontaneously, as a component of epigenetic perception.

[Ducklings following their mother](By Paula M Wolter - Own work, CC BY-SA 3.0, Link)

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