implantarea ovulului|Primul simptom de sarcina: sangerarea de implantare,noel winders

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。

Majoritatea oamenilor inteleg ca sarcina incepe cu fertilizarea ovulului de catre un spermatozoid. Dar ovulul mai are un drum lung de parcurs dupa fertilizare. Dupa ce a fost。

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Nude models directed by Spencer Tunick hold bottles in a Bourgogne (Burgundy) vineyard near Macon, France, on October 3, 2009, for a giant photograph during an operation with。

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