Efficacy of different estrus synchronization protocols in repeat breeder cows

Singh, Madhumeet; Sharma, Akshay; KAPSE, SUPRIYA; KASHYAP, AMIT; Kumar, Pragya

doi:10.56093/ijans.v89i9.93773

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…So in the current experiment, it was proposed that proper progesterone insert administration for 7 days suppress dominant follicle's development and estrus thus enhancing response of dominant follicle to GnRH-2 injection. It was reported by Singh et al (2019) that in repeat breeder cows Ovsynch protocol resulted in significantly higher conception rates. Progesterone regulates the pulsatile release of (LH) that has significant role in the development and growth of pre-ovulatory follicles.…”

Section: Hormones' Concentrationmentioning

confidence: 97%

Efficacy of Different Synchronization Protocols on Generation of Fertile Estrus, Hormonal Profile, and Conception Rate in Bos indicus Achai Cows

Khan¹,

Khan²,

Younas³

et al. 2023

SJA

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I n Pakistan Red Sindhi and Sahiwal are valuable milk breeds of global recognition, due to their distinctive characteristics. In addition to these well-known breeds of cattle, there is a large number of non-expressive and crossbred cattle in Pakistan. Among them, Achai, is a short stature, reddish brown coated breed of Khyber Abstract | This study evaluated the efficiency of two different estrus synchronization protocols in Achai breed of cattle. Twelve lactating Achai cows were divided into two equal groups and subjected to Presynch Ovsynch (POP) or Modified 7-day Select Synch (MSS) protocol. In POP protocol animals were administered with PGF 2 -α injections on day -38, -24 and -3. GnRH-1 was given on day -10 and 0, along with timed artificial insemination after 16 hrs. Animals in MSS group were administered with a controlled internal drug release (CIDR) insert on day -7 with simultaneous use of prostaglandin 2-alpha (PGF 2 -α), GnRH-1 at day -5, removal of CIDR at day 0, concurrent with two doses of PGF 2 -α at 8 hr. interval, GnRH-2 on day 3, followed by TAI after 16 hrs. Results showed higher estrogen (E 2 ) and lower progesterone (P 4 ) concentrations for MSS than POP group. Cows with higher E 2 and lower P 4 levels at estrus got conceived (P<0.05). Highest level of E 2 was recorded in pregnant cows in POP group in comparison with MSS. The P 4 concentration of pregnant cows in MSS was lowest at the time of insemination (P<0.05). Induction of fertile estrous was maximum in POP group than MSS, but conception rate in cows receiving TAI was significantly higher in MSS than POP group (66.66% vs 33.33%;). Efficiency of MSS protocol was virtually double than POP for estrus synchronization and conception in Achai cattle.

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Section: Hormones' Concentrationmentioning

confidence: 97%

Efficacy of Different Synchronization Protocols on Generation of Fertile Estrus, Hormonal Profile, and Conception Rate in Bos indicus Achai Cows

Khan¹,

Khan²,

Younas³

et al. 2023

SJA

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“…Irrespective of the management system, repeat breeding in dairy cows remained a major cause of infertility; it led to major economic losses because of reproductive wastage, culling, replacement costs, and loss of genetic gain" [1]. The incidence of repeat breeding in India has been reported from 19.19 [2] to 45.15 per cent [3] in cattle. "Among various factors associated with the occurrence of repeat breeding syndrome, asynchronous hormonal interplay was a major factor causing fertilization failure and early embryonic mortality" [4].…”

Section: Introductionmentioning

confidence: 99%

Comparative Efficacy of Different Oestrous Synchronization Protocols on Estrus Induction Response and Conception Rate in Repeat Breeder Dairy Cows

Kothandaraman,

Gnanasekar,

Varadharajan

et al. 2023

UPJOZ

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Repeat breeding is one of the exasperating reproductive disorders of dairy cows which results in heavy economic loss to dairy farmers. The present research was conducted to compare the efficacy of different oestrous synchronization protocols in repeat breeder cows under field condition. A total of 50 repeat breeder cows formed the experimental animals for the present study. The repeat breeder cows were randomly and equally assigned to one of the five groups. viz. CIDR (Group I; n=10), Ovsynch (Group II; n=10), Ovsynch+CIDR (Group III; n=10), Ovsynch+CIDR+Vitamin AD3E&H (Group IV; n=10) and Control (Group V; n=10) and bred accordingly. The pregnancy status was checked 45 days post insemination by rectal palpation. The estrus induction response and conception rate in all five groups are compared and analysed. Though cows from all groups expressed estrus, there was significant difference (P≤0.05) in their duration of estrus which was high in Group IV. The overall conception percentage obtained in Group I, II, III, IV and V were 30, 40, 60, 80 and 20 per cent, respectively. In this study, the highest overall percentage of conception rates were recorded in group IV (80.00) followed by group III (60.00) when compared to groups II (40.00), I (30.00) and Control (20.00). Hence, it is concluded from the present study that Ovsynch+CIDR+Vitamin AD3E&H protocol resulted in better estrus expression, duration and conception rate for treatment of repeat breeder cows under field conditions than other protocols.

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Effect of Body Condition Score on Estrus-Ovulation Synchronization and Pregnancy in Cows and Heifers

Koşal

Gülyüz

Uslu

2021

Van Veterinary Journal

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The most important factors affecting the success of artificial insemination are the balanced nutrition of the animals and the determination of estrus. Malnutrition causes a decrease in the Body Condition Score (BCS). Low BCS affects the deterioration of the metabolism of cows which has a primary influence on estrus and offspring productivity. In this study, estrus and ovulation synchronization was performed by forming three study groups from cows and heifers with a maximum BCS average of 2.95. Cows that were 3 -6 years old were included in Group I (n = 12) (BCS: 2.95 ± 0.62), heifers between 18-22 months of age and showing at least 1 estrus were included in Group II (n = 13) (BCS: 2.03 ± 0.37) and heifers between 18-22 months of age were included in Group III (n = 45) (BCS: 1.57 ± 0.38). Progesterone Implants remained in the vagina for 10 days in all groups. One day before removal of implants, 2000 IU PMSG and 5 ml PGF2α was injected to all groups. All animals were injected with 1500 IU hCG 24 hours after the implants were removed. After removal of implants, all animals were inseminated at 48 and 72 hours regardless of estrus symptoms. According to the groups, pregnancy rates of 58.33%, 38.46% and 13.33% were obtained, respectively. When the results were compared, it was found that the BCS rate and pregnancy rates were parallel (P<0.01). In line with these results, the importance of feeding and giving birth before has been revealed.

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Efficacy of different estrus synchronization protocols in repeat breeder cows

Cited by 4 publications

References 14 publications

Efficacy of Different Synchronization Protocols on Generation of Fertile Estrus, Hormonal Profile, and Conception Rate in Bos indicus Achai Cows

Efficacy of Different Synchronization Protocols on Generation of Fertile Estrus, Hormonal Profile, and Conception Rate in Bos indicus Achai Cows

Comparative Efficacy of Different Oestrous Synchronization Protocols on Estrus Induction Response and Conception Rate in Repeat Breeder Dairy Cows

Effect of Body Condition Score on Estrus-Ovulation Synchronization and Pregnancy in Cows and Heifers

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