Scanning electron microscopy of nonfunctional human ovaries

Area of Science:

• Reproductive Biology
• Cell Biology
• Histology

Background:

• The ovarian surface epithelium (OSE) plays a crucial role in ovulation and post-ovulatory repair.
• Understanding the ultrastructural characteristics of OSE in fertile versus infertile individuals is important for reproductive health.

Purpose of the Study:

• To compare the ultrastructural features of the ovarian surface epithelium in fertile and infertile women using scanning electron microscopy.
• To investigate the morphological differences in OSE related to ovulation and anovulation.

Main Methods:

• Ovarian samples from fertile and infertile patients (23-32 years) were prepared using glutaraldehyde fixation and critical point drying.
• Samples were sputter-coated with gold palladium and examined via scanning electron microscopy (SEM).

Main Results:

• OSE cells on the ovarian surface and papillae were similar to those covering stromal cell cores.
• Oocyte and granulosa cells exhibited connections via microvilli, desmosomes, and gap junctions.
• Post-ovulatory defects were filled with connective tissue, red blood cells, and follicle cells.
• Anovulatory ovaries displayed complete OSE coverage with dense microvilli and various projections.
• Ovulatory ovaries showed incomplete OSE repair at the rupture site, with OSE localized in specific areas.

Conclusions:

• Significant ultrastructural differences exist in the ovarian surface epithelium between ovulatory and anovulatory ovaries.
• Incomplete repair of the follicular rupture site in ovulatory ovaries suggests potential implications for fertility.
• The dense and varied surface features of OSE in anovulatory ovaries may indicate altered cellular activity or function.