Blastocyst - Hatching
Abbildung 1: Hatching blastocyst of optimal quality (Vaa) with the hatching site being at the 4 o’clock position. BC: blastocyst cavity; ICM: inner cell mass; TE: trophectoderm


Keywords: Biologie,  blastocyst,  Embryologie,  Hatching,  Reproduktionsmedizin

Blastocyst
Abbildung 2: Blastocyst (IVcb) with no visible inner cell mass (comparable to trophoblast vesicle). Trophectoderm quality is reduced since the left hemisphere consists only of a few large cells.


Keywords: Biologie,  blastocyst,  Blastozyste,  Embryologie,  Reproduktionsmedizin

Blastocyst
Abbildung 3: Full blastocyst (IIIbb) showing cell lineages with a limited number of cells. Arrow indicates presence of a necrotic focus in the inner cell mass.


Keywords: Biologie,  blastocyst,  Blastozyste,  Embryologie,  Reproduktionsmedizin

Blastocyst
Abbildung 4: Full blastocyst (IVac) showing rudimentary trophectoderm with necrotic focus (arrow).


Keywords: Biologie,  blastocyst,  Blastozyste,  Embryologie,  Reproduktionsmedizin

Inner cell mass
Abbildung 5: Inner cell mass of optimal size and shape. Reduction in developmental potential is due to the presence of vacuole (V) and necrotic focus (N).


Keywords: Biologie,  Embryologie,  inner cell mass,  innere Zellmasse,  Reproduktionsmedizin

Trophoblast vesicle
Abbildung 6: Trophoblast vesicle without inner cell mass consisting of only a minor number of trophectodermal cells.


Keywords: Biologie,  Embryologie,  Reproduktionsmedizin,  Throphoblast,  trophoblast vesicle

Blastocyst
Abbildung 7: Expanded blastocyst (IVaa) showing characteristic cytoplasmic strings (arrows) within the blastocoel.


Keywords: Biologie,  blastocyst,  Blastozyste,  Embryologie,  Reproduktionsmedizin

Blastocyst
Abbildung 8: Expanded blastocyst (IVaa) that collapsed prior to spontaneous hatching (“breathing”)


Keywords: Biologie,  blastocyst,  Blastozyste,  Embryologie,  Reproduktionsmedizin

Blastocyst
Abbildung 9a-b: Expanded blastocyst (IVaa) before vitrification (a). Full re-expansion is not reached 2h after warming (b).


Keywords: Biologie,  blastocyst,  Blastozyste,  Embryologie,  Reproduktionsmedizin