ArticleTropical animal health and production2026
Effect of advanced pregnancy on intraocular pressure, tear secretion and hemogram values in Holstein cows.
Article in Tropical animal health and production, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study investigates how pregnancy influences ocular physiology and hematological parameters in Holstein cows as a topic with limited representation in veterinary research. Thirty clinically healthy cows, aged 2–6 years, were examined and categorized into pregnant (n = 15) and non-pregnant (n = 15) groups. Intraocular pressure (IOP) and tear production (Schirmer Tear Test, STT) were measured bilaterally, and comprehensive blood profiles were evaluated. No statistically significant differences were observed between groups in IOP and mean STT values (p > 0.05); however, a notable asymmetry in tear production was found between the right and left eyes of pregnant cows (p < 0.05), suggesting a localized physiological modulation during gestation. Hematological results revealed significant changes in mean platelet volume (MPV) and atypical lymphocyte percentages and counts (%ALY, ALY) (p < 0.05), highlighting the systemic immune and hematologic adaptations that accompany pregnancy. These findings underscore the importance of recognizing pregnancy-induced physiological shifts in clinical evaluations to avoid misinterpretation of normal adaptive changes as pathological. Future research integrating hormonal profiling could provide deeper insight into the mechanisms driving these alterations.
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