Uterine Involution of Mares Supplemented with Dietary Algae-Derived Omega-3 Fatty Acids During the Peripartum Period.
Authors: Ferreira Julia Rizzo de Medeiros, Villela Saulo Baracat, Bianconi Camila, Ormieres Murillo, de Melo Gabriela Dalmaso, Pugliesi Guilherme, Gobesso Alexandre Augusto de Oliveira
Journal: Journal of equine veterinary science
Summary
# Editorial Summary: Algae-Derived Omega-3 Supplementation and Mare Uterine Recovery Rapid uterine involution after foaling is critical for conception at foal heat, yet nutritional interventions to accelerate this process remain understudied in equine practice. Researchers supplemented 18 mares with microalgae-derived docosahexaenoic acid (DHA) at 0.06 g/kg bodyweight from 90 days pre-foaling through seven days after first ovulation, whilst a control group received standard feeding, with reproductive ultrasound examinations and endometrial gene expression analysis tracking recovery over the peripartum period. Supplemented mares demonstrated significantly smaller uterine horn diameters and increased uterine echogenicity—a marker of reduced oedema and improved endometrial definition—during early post-partum, though intrauterine fluid accumulation, follicular dynamics, and inflammatory markers (IL-1β, CRP) showed no treatment differences. These findings suggest DHA supplementation may modestly enhance the physical mechanisms of uterine involution, potentially improving the physiological window for foal heat conception, though the authors acknowledge that demonstrating actual fertility benefits requires further investigation and larger-scale studies before confident clinical recommendations can be made.
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Practical Takeaways
- •DHA supplementation during the peripartum period may accelerate uterine involution in mares, potentially improving the timing and fertility of foal heat; consider supplementing from 90 days before expected foaling
- •While promising for uterine involution, DHA supplementation showed no clear benefit for follicular dynamics or early conception rates—additional research is needed before strong recommendations can be made
- •Ultrasound monitoring of uterine echogenicity and horn diameter remains valuable for assessing postpartum reproductive health independent of supplementation strategy
Key Findings
- •Mares supplemented with microalgae-derived DHA (0.06 g/kg BW) had smaller uterine horn diameters during postpartum compared to controls
- •DHA-supplemented mares demonstrated greater uterine echogenicity in early postpartum period
- •No significant treatment effects on follicular dynamics, intrauterine fluid, or endometrial gene expression (CRP, IL-1β) were detected
- •Uterine and endometrial diameter, intrauterine fluid, echogenicity, and AKR1C4 transcript abundance all changed significantly over time postpartum regardless of treatment