Administration of glycerol-based formulations in sheep results in similar ovulation rate to eCG but red blood cell indices may be affected.
Authors: Porcu Cristian, Sotgiu Francesca D, Pasciu Valeria, Cappai Maria Grazia, Barbero-Fernández Alicia, Gonzalez-Bulnes Antonio, Dattena Maria, Gallus Marilia, Molle Giovanni, Berlinguer Fiammetta
Journal: BMC veterinary research
Summary
# Editorial Summary Researchers investigated whether glycerol-based nutritional supplements could replicate the ovulation-stimulating effects of equine chorionic gonadotrophin (eCG) in Sarda sheep whilst avoiding adverse effects on blood parameters. Following initial metabolic and osmotic screening of various glycerol and glycerol–propylene glycol formulations, selected doses were administered to ewes during an induced follicular phase, with ovulation rates and red blood cell indices compared directly against eCG treatment. The glycerol-based supplements achieved ovulation rates comparable to eCG, suggesting metabolic priming could offer a non-hormonal alternative for reproductive management. However, administration resulted in measurable changes to RBC indices, indicating potential physiological stress that warrants careful monitoring in clinical application. For equine and other practitioners considering metabolic interventions to enhance reproductive performance, these findings highlight the importance of balancing efficacy against systemic effects, particularly in protocols requiring repeated dosing or used in animals with compromised haematological status.
Read the full abstract on PubMed
Practical Takeaways
- •Glycerol-based supplements can stimulate ovulation comparably to eCG, offering a non-hormonal alternative for reproductive management in sheep
- •Not all doses of glycerol formulations are safe—careful dose selection is critical to avoid negative effects on red blood cell parameters
- •This approach may have applications for improving metabolic status while managing reproduction, but requires further validation before practical adoption
Key Findings
- •Glycerol-based formulations produced similar ovulation rates to eCG hormonal treatment in induced follicular phase
- •Red blood cell indices were adversely affected by some glycerol and glycerol-propylene glycol doses
- •Specific doses of glycerol formulations improved ewe metabolic status without harmful RBC changes