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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。

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

Implantarea ovulului. După fecundare, urmează implantarea ovulului. Acesta va parcurge o călătorie de 4 zile, de la trompele uterine către uter. Se numește blastocist acum.。

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