Title: Efficacy of different estrus synchronizing protocols on estrus induction in postpartum lactating dairy cows
Authors: V Dudi, JS Mehta, AK Chaudhary, Pramod Kumar, Amit Kumar and Swati Ruhil
Source: Ruminant Science (2017)-6(2):337-340.
Cite this reference as: Dudi V, Mehta JS, Chaudhary AK, Kumar Pramod, Kumar Amit and Ruhil Swati (2017). Efficacy of different estrus synchronizing protocols on estrus induction in postpartum lactating dairy cows. Ruminant Science 6(2):337-340.
Abstract
The present study was conducted on 75 postpartum dairy cows (cyclic and acyclic) to evaluate the estrus synchronization protocols i.e. 5 day Co-Synch+TRIU-B (T1; n=25), Ovsynch (T2; n=25), Heatsynch (T3; n=25). Ten cyclic cows were kept as untreated control (C). Blood samples were taken from the treated cows on day 0, day of PGF2α inj. (day of 1st PGF2α IM in T1 group), day of AI and day 21 post AI, while, on day of AI & day 21 post AI from control animals for serum progesterone (P4) analysis. All the cows (treated and control) were inseminated on estrus. The estrus induction rate was 91.66%, 88% and 96% in T1, T2 and T3 group, respectively. Expression of estrus signs was highest in Heatsynch protocol group cows as compare to other groups. The conception rates were 65%, 59.09%, 50% and 70% in T1, T2, T3 and control group, respectively. The overall mean P4 values were significantly (P<0.01) higher on the day of PGF2α administration and on the day 21 post AI. The P4 concentrations were significantly (P<0.01) higher in conceived animals than non-conceived on day 21 post-AI in all groups. Heatsynch protocol was most effective for induction of estrus while conception rate was better with 5 day Co-synch+TRIU-B protocol than the Ovsynch and Heatsynch protocols.
References
Bhoraniya HL, Dhami AJ, Naikoo M, Parmar BC and Sarvaiya NP (2012). Effect of estrus synchronization protocols on plasma progesterone profile and fertility in postpartum anestrous Kankrej cows. Tropical Animal Health and production 44(6):1191-97.
Buhecha KV, Dhami AJ, Hadiya KK, Patel MD, Parmar SC and Killedar A (2015). Influence of different estrus synchronization protocols on fertility and plasma progesterone in anoestrus crossbred cows. Indian Journal of Animal Reproduction 36:1-5.
Cavalieri J, Hepworth G and Fitzpatrick LA (2005). Synchronising oestrus with oestradiol benzoate after using a two dose prostaglandin treatment to synchronise luteolysis in dairy heifers. Australian Veterinary Journal 83:91-6.
Colazo MG and Ambrose DJ (2013). New research in controlled breeding programs for dairy cattle. WCDS Advances in Dairy Technology 25:75-95.
Dhami AJ, Nakrani BB, Hadiya KK, Patel JA and Shah RG (2015). Comparative efficacy of different estrus synchronization protocols on estrus induction response, fertility and plasma progesterone and biochemical profile in crossbred anestrus cows. Veterinary World 8(11):1310-16.
Hafez ESE (2008). Reproduction in Farm Animals. 7th Edn, Lea and Febiger. Philadelphia.
Madushanka DNN, Ranasingha VM, Bandara AMS, Mayurawansha WRAS and Magamage MPS (2016). Body condition score and locomotion score help to predict reproductive and health performances of dairy cattle. Ruminant Science 5(2):179-186.
Moreira F, Sota RL, D´ýaz T and Thatcher WW (2000). Effect of day of estrous cycle at the initiation of a timed insemination protocol on reproductive responses in dairy heifers. Journal of Animal Science 78:1568-76.
Naikoo M, Dhami AJ and Ramakrishnan A. (2016). Effect of estrus synchronization on plasma progesterone profile and fertility response in postpartum suckled anestrous Kankrej cows. Indian Journal of Animal Research 50(4):460-465.
Pursley JR, Wiltbank MC, Stevenson JS, Ottobre JS, Garverick HA and Anderson LL (1997). Pregnancy rates per artificial insemination for cows and heifers inseminated at a synchronized ovulation or synchronized estrus. Journal of Dairy Science 80(2):295-300.
Ramakrishnan A, Dhami AJ, Naikoo M, Parmar BC and Divekar BS (2012). Estrus induction and fertility response in postpartum anestrus Gir cows. Indian Journal of Animal Reproduction 33(1):37-42.
Singh BS, Saxena A, Kumar B, Gunaranjan KS and Mishra S (2012). Effect of progesterone impregnated intravaginal sponges, pmsg and estradiol valerate on oestrus induction, fertility and progesterone profile in sahiwal heifers. Ruminant Science 1(2):125-126.
Shukla MK and Garg A (2012). Efficacy of different route of administration and doses of dinoprost in estrus induction/ synchronization in subestrus murrah buffaloes. Ruminant Science 1(1):63-65.
Snedecor and Cocharn (1985). Stastical Method. Iowa State University Press, USA.
Stevenson JS, Pursley JR, Garverick HA, Fricke PM, Kesler DJ, Ottobre JS and Wiltbank MC (2006). Treatment of cycling and noncycling lactating dairy cows with progesterone during Ovsynch. Journal of Dairy Science 89:2567-2578.