CYCLICAL VARIATION OF SERUM CHOLESTEROL AND PROTEIN ALONG WITH OESTRADIOL -17 β AND PROGESTERONE DURING THE OESTROUS CYCLE FOLLOWING APPLICATION OF EXOGENOUS HORMONES

The present experiment was undertaken to study Cyclical variation of serum cholesterol and protein along with oestradiol -17β and progesterone during the oestrous cycle following application of exogenous hormonal treatment (Iliren and Crestar) in indigenous cows of Assam. Fifteen healthy cyclic indigenous cows of Assam of first to second lactation were included in the experiment. They were randomly divided into three groups – I, II and III, each comprised of 5 cows. The group I cows were kept as control (untreated) animals, group II were treated with Iliren (a PGF2 α analogue) and group III were treated with Crestar ear implant (3 mg Norgestomet, 5 mg Estradiol valerate). Serum cholesterol showed a decreasing trend from the day of oestrus towards the mid oestrous cycle, which again showed an increase towards the subsequent oestrus. The serum protein concentrations showed rise and fall like that of serum progesterone concentration.