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Thyroid function in relation to reproductive efficiency in postpartum buffaloes (Bubalus bubalis) during summer and
Archiv Fur Experimentelle Veterinarmedizin
|January 1, 1989
Summary
Thyroid function in postpartum buffaloes is lower in summer and in animals with poor reproductive outcomes. Plasma-protein-bound iodine (PBI) levels indicate depressed thyroid activity during these periods.
Area of Science:
- Veterinary Endocrinology
- Reproductive Physiology in Livestock
Background:
- Thyroid hormones play a crucial role in metabolic regulation and reproductive efficiency.
- Postpartum period in buffaloes is a critical phase for physiological adjustments and reproductive cyclicity.
- Understanding thyroid function dynamics is essential for improving buffalo reproductive performance.
Purpose of the Study:
- To investigate the changes in thyroid function, assessed by plasma-protein-bound iodine (PBI), in postpartum buffaloes.
- To correlate PBI levels with seasonal variations and reproductive parameters such as uterine involution, follicular development, and oestrus interval.
- To identify factors influencing thyroid activity in buffaloes during the postpartum period.
Main Methods:
- Estimation of plasma-protein-bound iodine (PBI) levels in buffaloes from 0 to 57 days postpartum.
- Statistical analysis to compare PBI values across different seasons (summer vs. winter).
- Correlation of PBI levels with reproductive parameters: days for uterine involution, days for follicular development initiation, postpartum oestrus interval, and conception status.
Main Results:
- PBI values were lowest on day 1 postpartum, gradually increasing by day 57.
- Significantly lower PBI levels were observed during summer compared to winter (P < 0.01).
- Lower PBI values were associated with longer durations for uterine involution, delayed follicular development, and longer postpartum oestrus intervals (P < 0.01).
- Conceiving buffaloes showed slightly higher PBI values than non-conceiving ones (P < 0.05).
Conclusions:
- Thyroid function in buffaloes is significantly depressed during the summer season.
- Impaired reproductive parameters in buffaloes are linked to depressed thyroid function.
- Monitoring PBI levels could be a valuable indicator for assessing thyroid status and reproductive health in postpartum buffaloes.