Seasonal variations in oestradiol-17β and luteinizing hormone in the blood of buffalo cows (Bubalus bubalis)

Abstract

Changes in the plasma concentrations of oestradiol-17β and LH were measured in six buffaloes exhibiting regular oestrous cycles for one calendar year. Significantly higher concentrations of oestradiol-17β and LH were observed around oestrus during the cooler months than during the hotter months whereas no significant fluctuations were observed in the basal levels of either hormone throughout the year.