Department of Animal Reproduction, Gynaecology and Obstetrics College of Veterinary Science and Animal Husbandry, S.D.A.U., Sardarkrushinagar, Gujarat-385 506, India
Present Communication Address: *Assistant Professor, Dept. of Animal Reproduction Gynaecology and Obstetrics, College of Veterinary Science and AH, Navsari Agricultural University, Navsari 396 450, Gujarat (drcfchaudhari@yahoo.co.in)
Part of M.V. Sc. thesis of the first author submitted to SDAU, Sardarkrushinagar, Gujarat.
Present investigation was carried out on eighteen anestrus Kankrej heifers of delayed puberty. All the heifers were randomly divided in to three equal groups and implanted with Crestar ear implant for 9 days with and without Inj. Folligon and Inj. Receptal administered immediately after implant removal and at the time of breeding, respectively. Blood serum was obtained from all the animals before implant insertion, during implant period in situ, at induced estrus and up to 20 days post estrus at 5 days interval for total serum cholesterol estimation. The average total serum cholesterol levels varied significantly (P ≤ 0.05) in group 1 and group 2, and non-significantly in group 3. Gradually increased levels from the day of implant insertion to the day of induced estrus were observed in all the three groups. The values were found highest on the day of estrus within the treatment in group 2 and group 3. It was concluded that the higher cholesterol level recorded at the induced estrus in the heifers indicated more secretion of steroids during estrus due to increased ovarian activity.
Anestrus, Delayed puberty, Induced estrus, Norgestomet ear implant, Serum cholesterol
