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Impact of Buserelin Acetate or hCG Administration on the Day of First Artificial Insemination on Subsequent Luteal Profile and Conception Rate in Murrah Buffalo ( B ubalus bubalis )
Author(s) -
Pandey AK,
Ghuman SPS,
Dhaliwal GS,
Agarwal SK,
Phogat JB
Publication year - 2016
Publication title -
reproduction in domestic animals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.546
H-Index - 66
eISSN - 1439-0531
pISSN - 0936-6768
DOI - 10.1111/rda.12705
Subject(s) - estrous cycle , murrah buffalo , luteal phase , corpus luteum , artificial insemination , ovulation , buserelin , human chorionic gonadotropin , insemination , andrology , endocrinology , equine chorionic gonadotropin , pregnancy rate , medicine , chemistry , biology , zoology , pregnancy , ovary , follicular phase , sperm , hormone , genetics , receptor , agonist
Contents This study was designed to investigate the impact of buserelin acetate ( BA ) or human chorionic gonadotropin ( hCG ) administration on the day of first artificial insemination ( AI ) on subsequent luteal profile (diameter of corpus luteum ( CL ) and plasma progesterone) and conception rate in Murrah buffalo. The present experiment was carried out at two locations in 117 buffalo that were oestrus‐synchronized using cloprostenol (500 μg) administered (i.m.) 11 days apart followed by AI during standing oestrus. Based on treatment (i.m.) at the time of AI , buffalo were randomly categorized (n = 39 in each group) into control (isotonic saline solution, 5 ml), dAI ‐ BA (buserelin acetate, 20 μg) and dAI ‐ hCG ( hCG , 3000 IU ) group. Out of these, 14 buffalo of each group were subjected to ovarian ultrasonography on the day of oestrus to monitor the preovulatory follicle and on days 5, 12, 16 and 21 post‐ovulation to monitor CL diameter. On the day of each sonography, jugular vein blood samples were collected for the estimation of progesterone concentrations. All the buffalo (n = 117) were confirmed for pregnancy on day 40 post‐ovulation. The conception rate was better (p < 0.05) in dAI ‐ BA (51.3%) and dAI ‐ hCG (66.7%) groups as compared to their control counterparts (30.8%). Furthermore, the buffalo of dAI ‐ hCG group had improved (p < 0.05) luteal profile, whereas the buffalo of dAI ‐ BA group failed (p > 0.05) to exhibit stimulatory impact of treatment on luteal profile when compared to control group. In brief, buserelin acetate or hCG treatment on the day of first AI leads to an increase in conception rate; however, an appreciable impact on post‐ovulation luteal profile was observed only in hCG ‐treated Murrah buffalo.