Hi guys and gals, I'll see if I can explain clearly the process of fertilization, ie the path the sperm must do to come into contact with the egg. The intention is that let's worry about all those forms that you invent, and some have the Internet to scare the youth, risk of pregnancy.
Now, in normal health conditions ejected a man ejaculate seminal fluid an amount ranging from 2 to 6 milliliters (a little less than a tablespoon). And a sperm count ranging from 20 to 250 million per milliliter, ie from 40 to 1,000 million sperm every time you ejaculate. The figure is needed So while it is true that only one enters the egg, the rest of millions are absolutely necessary so that this one can get there. In literary terms, sits on the throne only a king, but have generally been required millions of dead that arrived.
Of those 2 to 6 milliliters of semen, 10% are sperm (the cell line that carries genetic information from father), the remaining 90% is made up of water and some mucus with substances essential to the survival of spermatozoon. Are fructose, phosphatases, etc., this fluid tends to clot (thicken) or become hard mucus for itself in contact with air or any substance other than the liquid containing the woman's sexual fluid. This hardened mucus will hinder the movement of the sperm tail, without this move the sperm will be unable to walk.
Once deposited in the vagina, the way that sperm must travel to reach the egg, is long and difficult. Long because, given its size, the 15 cm. that separate the egg, equivalent to a journey of hundreds of miles to us. And difficult because, apart from that there are a number of difficulties and barriers to their advancement through the woman's genitals, have to make this move in a very short time. Immediately after intercourse a lot of sperm that are semen, vaginal die in the same victims of the acidity of its content, that they were not suitable. Only those who get refuge in the cervix survive. Here there is a mucus that undergoes significant changes every cycle, outside the time of ovulation, its extreme density and viscosity act as a barrier to sperm, by contrast, at the time of the start ovulating, so thins which facilitates the promotion thereof. There is also a training process of sperm if there is no viable leaves to fertilize. Is a change in the membrane proteins of sperm in the female reproductive tract that lasts from one to four hours. Without this change can not be fertilization.
sperm (yellow) trying to enter the egg (orange)
When they leave the shelter in the cervical mucus, many of them lose their way and perish. Only a few thousand manage to find the way to the fallopian tubes and entering. But only one of which contains the egg, which means that half of them the result will be useless. Finally, to encounter the egg only comes about two hundred sperm of the millions that were deposited, those around the egg and release a protein enzyme (hyaluronidase), which works by breaking the layers surrounding the egg. Only one of these is able to get full, active substances entering preventing the entry of male gametes.
From all this you can easily tell that to achieve a pregnancy occur:
needed a significant number of sperm.
the sperm must be protected at all times in the mucus,
and this has to be fairly complex conditions to help, not to give conditions precise mucus hardens and leaves the sperm, but not dead, inactive.
As you can see it is absurd to think that a finger can take a single sperm and in superhero plan to be able to overcome all the difficulties that puts nature, do not say anything if the difficulty is through some clothes.
read the article about how it is impossible to become pregnant to supplement this and rest easy. You already know there are only three real ways there is a pregnancy and these the find in the other article have I been able to get pregnant?
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