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Table 2 Ultrastructural changes in IVG mouse ovarian follicles cultured with or without FSH (100 mIU/ml) for 6 days

From: Ultrastructure of isolated mouse ovarian follicles cultured in vitro

Group Shape        
    Oocyte Granulosa Theca
    Organelle
distribution
Oolemma Zona
Pellucida
N° and
arrangement of
layers
Transzonal
processes*
Signs of
degeneration
N° of
layers
FCS 20 Rounded Juxta-nuclear Microvilli +/- Intact 4-5
Compact
++ Present in
40% of
samples
1-2
FSH
ANTRAL
20 Rounded Scattered Microvilli + Intact 6-8
Cell loosening,
with fluid-filled
intercellular spaces
Innermost layer
discontinuous
+/- Present in
10% of
samples
1-2
FSH
NON-
ANTRAL
20 Rounded Scattered Microvilli +/- Intact 6-8
Compact
+ Present in
40% of
samples
1-2
  1. *See Table 1 for details