The Oocyte

Figure 61

MII oocyte with a thick and dense ZP (200× magnification).

Figure 62

MII oocyte with a thick ZP (200× magnification).

Figure 63

MII oocyte with a thick and dark ZP. Some inclusions are visible in the ooplasm.

Figure 64

MII oocyte with a thick and dark ZP whose thickness is not homogeneous

Figure 65

MII oocyte observed using polarized light microscopy with a clear birefringent ZP inner layer. The MS is dislocated from PB1 by almost 90°.

Figure 66

MII oocyte observed using polarized light microscopy with a clear birefringent ZP inner layer. The MS is also clearly visible at the 3 o'clock position in this view.

Figure 67

MII oocyte showing different degrees of ZP inner layer birefringence. The figure has a high degree of birefringence.

Figure 68

MII oocyte showing different degrees of ZP inner layer birefringence. The figure has a low degree of birefringence.

Figure 69

Oocyte with an abnormally shaped ZP and with what appears to be a duplication of, or tears in, the ZP. The oocyte has an irregular shape and cytoplasmic appearance with a large sized PB1.

Figure 70

Oocyte with an abnormally shaped ZP and with what appears to be a duplication of, or tears in, the ZP. The oocyte is highly dysmorphic with no evident PB1 in the PVS.

Figure 71

Oocyte with an abnormally shaped ZP and with what appears to be a duplication of, or tears in, the ZP. The oocyte has a regular shape.

Figure 72

Oocyte with a large PVS. There is a large granular area in the cytoplasm.

Figure 73

Oocyte with a large PVS. Several fragments are present in the PVS.

Figure 74

Oocyte with a large PVS and a granular cytoplasm.

Figure 75

MII oocyte with a normal-sized PBI.

Figure 76

MII oocyte with a large PBI, 3–4 times larger than normal.

Figure 77

MII oocyte with a giant PBI, 5-6 times larger than normal.

Figure 78

MII oocyte with a giant PBI.

Figure 79

MII oocyte with large fragments and a large PBI in the PVS.

Figure 80

MII oocyte with a fragmented PBI (two pieces).

Figure 81

MII oocyte with a fragmented PBI (two pieces) (magnification ×1000).

Figure 82

MII oocyte with a fragmented PBI and several cellular fragments within the PVS which are almost indistinguishable from PB1.

Figure 83

MII oocyte with a lobular/fragmented PBI and significant granulation in the The ZP has a dishomogeneous thickness and an irregular inner layer.

Figure 84

MII oocyte with a lobular/fragmented PBI and significant granulation in the PS. Two inclusion bodies can clearly be seen in the centre of the oocyte.