Histomorphometric parameters and fractal complexity of the equine placenta from healthy and sick foals.

The research explores the use of computer-based digital image analysis to assess the structure and complexity of equine placenta in healthy and sick foals, suggesting that this technique could provide valuable insights into variations in placental growth and patterning in these two groups.

Introduction

• This study applies digital image analysis to study the histomorphometric parameters and fractal complexity of equine placentas derived from healthy and sick foals.
• The researchers propose that sick foals might exhibit different growth patterns and complexities in their placentas, characteristics that can possibly be quantified through their fractal dimension (FD).

Methodology

• The study cohort comprised fourteen placentas from 30 mares from the 2013 breeding season.
• The samples are divided into two groups: Group 1 (seven mares with normal pregnancy, uneventful delivery, and healthy foals) and Group 2 (seven mares with normal or high-risk pregnancy, uncomplicated delivery and sick foals).
• Four of the seven mares in Group 2 were classified as high-risk based on medical history and ultrasound findings.
• Sick foals in Group 2 were diagnosed with perinatal asphyxia syndrome, prematurity/dysmaturity, or a combination of the two.

Findings

• Seven of the fourteen placentas displayed gross abnormalities. These were observed in a single case (14.28%) in Group 1 and six cases (85.72%) in Group 2.
• Digital image analysis was deemed efficient in segmentation, calculation, and edge detection of villi.
• Healthy foals’ placentas portrayed uniform and homogeneous villi growth, as indicated by geometric parameters and FD, representing a harmonic growth pattern.
• In contrast, the sick foals’ placentas depicted ununiformed growth patterns and complexities, characterized by a higher number of more developed villi, particularly in the pregnant horn (PH) and nonpregnant horn (NPH) compared to the body (B).
• Furthermore, the nonpregnant horn exhibited a higher FD than the other regions, suggesting a compensatory growth with increased complexity.

Conclusion

• The findings indicate that morphometric analysis, especially FD measurement, can serve as a supplementary histological instrument for equine placenta evaluation.
• The results suggest that chorionic villi might have a higher branching complexity in sick foals, notably in the NPH, possibly representing an attempt to enhance the exchange area between the fetal and maternal components of the equine placenta.
• This raises the possibility of further research in this area to confirm and further explore these findings.