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Pentru a ramane insarcinata trebuiimplantarea ovululuie ca un ovul (eliberat de ovar lunar in cadrul ciclului menstrual) sa fie fertilizat de spermatozoizi din lichidul seminal ejaculat de barbat in vaginul femeii (in cadrul unui contact sexual in care nu se foloseste niciun mijloc de contraceptie). Fertilizarea are loc in trompa uterina.。 See more

Un ciclu obisnuit dureaza 28 de zile. Ziua cu numarul 1 este prima zi a menstruatiei. Ziua 14 este caracterizata de ovulatie si fertilizare. Daca。

Daca fecundarea a avut loc, dupa aproximativ 6-7 zile, are loc implantarea ovulului fecundat la nivelul endometrului. De asemenea, se produce secretia de HCG (gonadotropina corionica umana), un hormon esential in。

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悠月 リimplantarea ovululuiアナ（ゆづき りあな、1997年 12月4日 - ）は、日本の元AV女優。Duoエンターテイメント所属 。

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