Primordial Follicle Response to Two Methods of Ovarian Cortex Retrieval and Vitrification: A Pilot Study
Rebeca Chávez-Genaro1, Gabriel Anesetti1, Lorena Bonjour1
1Histology and Embryology, Universidad de la República, Montevideo, URY.
Cureus
|June 27, 2025
Summary
Ovarian tissue cryopreservation using vitrification shows promise for fertility preservation. However, tissue manipulation during processing can impact primordial follicle activation and viability, necessitating optimized techniques for better outcomes.
Area of Science:
- Reproductive biology
- Cryobiology
- Oncofertility
Background:
- Fertility preservation is crucial for young patients undergoing gonadotoxic treatments.
- Vitrification of ovarian cortical tissue is a key technique for restoring fertility.
- Maintaining follicular health during cryopreservation is essential for successful transplantation.
Purpose of the Study:
- To compare the effects of two ovarian cortex dissection techniques (strips vs. layers) on primordial follicle activation and stromal tissue.
- To evaluate the impact of tissue manipulation on oocyte viability and reproductive potential after vitrification.
- To identify optimal tissue processing methods for enhanced fertility preservation.
Main Methods:
- Ovine animal model used for ovarian cortex cryopreservation and transplantation.
- Comparison of ovarian cortex dissection into strips versus layers.
- Assessment of primordial follicle activation and stromal tissue integrity post-vitrification.
Main Results:
- Ovarian cortex manipulation during vitrification increases primordial follicle activation.
- Both strip and layer dissection methods impact stromal tissue and follicle activation.
- The distribution of primordial follicles within the ovarian tissue influences transplantation success.
Conclusions:
- Mechanical manipulation of ovarian cortex affects follicle activation and stromal integrity during vitrification.
- Optimizing tissue processing is critical for improving fertility preservation outcomes.
- Further research into the role of stromal and extracellular matrix (ECM) is needed to maintain follicle dormancy and viability post-cryopreservation.
