Estrogen and Progesterone hormone levels in Punganur Cattle

The present study was conducted at Livestock Research Station, Palamaner, Chittoor district, Andhra Pradesh to estimate female reproductive hormone values in Punganur cattle. The blood samples were collected from the twelve Punganur cows on 0, 3, 6, 9, 12, 15, 18 and 21 days of estrous cycle. The serum was separated from the blood samples and was transferred into sterile eppendorf tubes, labeled and stored in deep freeze (-20 C) until hormonal assay for progesterone and estrogen was carried out. The estrogen level (ng/ml) in Punganur cows during estrus cycle was significantly higher (P<0.01) on ‘0’ day (20.24) and decreased upto 15 days (12.36) and thereafter gradually increased to a level of 22.58 on day ‘00’.The mean progesterone level (ng/ml) in Punganur cows during estrus cycle increased significantly (P<0.01) upto 15 day of estrus cycle and gradually decreased thereafter with the values ranging from 0.43 (‘0’ day) to 10.66 (15 th day) and from 8.64 (18 th day) to 0.34 (day 00).