Hormonal composition of follicular fluid from abnormal follicular structures in mares.

This research studied the hormonal composition of follicular fluid in horses and found differences in levels of certain hormones in fluid drawn from cystic follicles as opposed to normal ones. This could potentially be used as a diagnostic tool and indicate the role of the IGF system in the development of ovarian cysts.

Objective of the Study

• The main aim of this study was to understand the hormonal composition of follicular fluids in mares with distinct anovulatory-cystic follicles. The anovulatory cystic follicle is a form of abnormal follicular structure.

Methodology

• Follicular fluid was taken from six mares (female horses) showing signs of cystic follicles and five normal mares.
• The study then looked at the differences in certain hormones: progesterone, oestradiol, testosterone, and IGF-I, including IGF binding.
• The statistical analysis used for determining any difference was Fisher’s exact test.

Findings

• The findings show that the concentration of oestradiol was higher in normal follicles than in the cystic ones.
• Conversely, the testosterone level was higher in the cystic follicles than the normal ones.
• Also, a greater percentage of IGF-I binding and lower concentrations of IGF-I were observed in the fluid from the cystic structures compared to the fluid from normal follicles.

Implications

• The discovery that fluid in cystic follicles has higher testosterone and lower oestradiol concentrations could provide a new diagnostic tool for distinguishing between a cystic and non-cystic persistent follicle.
• The research also implies that the IGF system may play a significant role in the formation and maintenance of anovulatory follicular structures in mare ovaries. This could help understand the pathogenesis and potentially the treatment of these structures.