The period after fertilisation

The period after fertilisation

So, usually only unique сперматозоид interferes in female яйцеклетку, thus there is a fertilisation and conception of one new life.
At first in female яйцеклетку the head сперматозоида gets, then by means of a threadlike tail it goes forward to its kernel. As soon as the kernel яйцеклетки appears close enough from a kernel сперматозоида, the tail, обес­печивавший progress, disappears from a head сперматозоида as superfluous. Simultaneously female яйцеклетка it is enveloped dense белко­вой by a cover which blocks a way to all to another still directing to it сперматозоидам.
Проникшая in яйцеклетку the head сперматозоида begins there and then увеличивать­ся in size, turning in so-called предъядро, the kernel female яйцеклетки too will be transformed. Merging together, they form one kernel of one cage. Fertilisation comes to an end with it.
At the moment of fertilisation it is already defined, who will develop from the formed cage: the boy or the girl, at new beings are pawned all inherited properties and qualities.

Germ implantation

Within next three-four days the impregnated cage moves on яйцеводу (маточной to a pipe) н gets to a uterus. Then there pass some more days before the cage will be attached to a uterus mucous membrane. Implantation of the impregnated cage is carried out after approximately eight days after за­чатия.
While the impregnated cage has not become stronger on a uterus wall, still early го­ворить about pregnancy. Only after that the organism of future mother receives a signal, that in it the new life has started to develop, and starts to be reconstructed on a new mode of a life. There are numerous changes, characteristic for the come pregnancy which allow an organism to adapt to вы­нашиванию a fruit. Doctors name the period from the moment of fertilisation till the moment of an attachment of the impregnated cage to a wall of a uterus prepregnancy.
Such situation at which опло­дотворенное egg is implanted not in a uterus mucous membrane results in drama consequences, and out of it, more often in яйцеводе. On hundred normal беременностей on the statistican one is necessary extra-uterine. In the beginning it has the same signs, as is normal протека­ющая: stop менструации, analyses show pregnancy presence, there is a nausea, etc. In most cases in the middle or the end of the second month of pregnancy (beginning from the first day of last менструации) appear кровянистые allocation and softly expressed pains in a side, similar to spasms.
At a strong bleeding in a belly cavity the life of the woman appears under the threat. Suddenly there are sharp and strong pains in the bottom part of a stomach, кото­рые gradually extend on all body: a belly cavity, shoulders, hands. Suddenly there comes the condition of extreme weakness passing in a faint. The woman turns pale, breath becomes faltering, pulse becomes frequent and is badly listened. At occurrence of similar symptoms the woman needs неза­медлительно to be taken to hospital.
Each extra-uterine pregnancy demands operative intervention. Пер­вая the operation purpose — to stop a bleeding. Яйцевод in which the oosperm has become stronger, should be removed in overwhelming majority of cases; яичник on this party usually it is possible to keep. Complications at such опе­рациях are rather rare. Patients usually quickly recover. Опас­ность repeated extra-uterine pregnancy makes approximately 25 %.

25.11.2006