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Pentru a ramane insarcinata trebuie 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

In general, implantarea ovulului fertilizat pe peretele uterin apare la aproximativ 9 zile dupa ovulatie. Desi numarul exact de zile variaza, va aparea in a patra saptamana de sarcina. Daca la 9 – 10 zile dupa perioada de。

Daca fecundarea a avut loc, dimplantarea ovululuiupa 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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