Study of sexual behaviours with different types of estrus synchronization protocols in Boer goats

Salleh, Suraya Mohamad; Basri, Abdul Mu’in Hassan; Yaakub, Halimatun

doi:10.1590/1984-3143-ar2020-0038

Cited by 6 publications

(4 citation statements)

References 29 publications

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“…PMSG, with physiological activities similar to those of FSH and LH, influences follicle development and hormone secretion and is often used with P4 for the ES of dairy goats ( 3 , 34 ). Further, anti-PMSG forms a macromolecular antigen–antibody complex in vivo , neutralising PMSG and reducing its biological titre ( 14 , 15 ).…”

Section: Discussionmentioning

confidence: 99%

Influence of repeated estrus synchronization treatment on hormone secretion, growth, and development of dairy goats

Sun,

Lv,

Niu

et al. 2024

Front. Vet. Sci.

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In large-scale intensive farms, dairy goats often undergo frequent estrus synchronization (ES) treatment, which may result in a decline in reproductive performance; however, the underlying mechanism remains unclear. The present study aimed to investigate the effect of pregnant mare serum gonadotropin (PMSG) and progesterone (P4)-mediated ES treatment on fertility in dairy goats, while also identifying key metabolic and endocrine mechanisms that influence reproductive performance in does subjected to repeated ES treatment. Forty-eight Saanen does were randomly assigned to two groups (24 goats each) that received ES treatments either thrice fortnightly (3-PMSG) or once (1-PMSG) simultaneously with the third ES treatment of the 3-PMSG group during the breeding season. ES treatment was performed via the intravaginal insertion of a controlled internal drug release (CIDR) device impregnated with 300 mg P4, followed by 300 IU PMSG injections 48 h before CIDR withdrawal. Blood was collected to detect the level of hormones and blood biochemical indices. Additionally, estrus rate, fecundity rate, body weight, size, and lactation performance were measured. The results showed that repeated ES treatment markedly decreased the estrus rate and fecundity rate of goats. Among the does in all groups, there was no substantial difference in follicle stimulating hormone, luteinising hormone, gonadotropin-releasing hormone, melatonin, growth hormone, PMSG, total cholesterol, total protein, and glucose levels, as well as the body weight, body size, and lactation performance. Repeated ES treatment elevated estrogen (E2) levels 36, 48, and 72 h post-CIDR removal; increased P4 upon CIDR insertion; and raised PMSG antibody levels 24, 48, and 72 h post-CIDR removal. The results suggest that elevated anti-PMSG levels are the primary reason for the decline in ES efficiency, and that high E2 and P4 levels at some time points also impair reproductive performance. These findings provide novel insights into the metabolic effects of repeated PMSG stimulation in goats, guiding future reproductive hormone use in breeding practices.

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Section: Discussionmentioning

confidence: 99%

Influence of repeated estrus synchronization treatment on hormone secretion, growth, and development of dairy goats

Sun,

Lv,

Niu

et al. 2024

Front. Vet. Sci.

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“…The results of this study showed that the SP group had the best treatment regimen in terms of onset of oestrus (32.4 hours, ranging from 26.5 to 38.3 hours) and duration of oestrus (52.2 hours, ranging from 48.7 to 55.7 hours). Salleh et al (2021) Boer does were divided into three groups with different durations of intravaginal CIDR for 14 (two groups) or 9 days (one group) -0.5 ml cloprostenol (PGF2α) was administered intramuscularly to all groups after CIDR removal, and only groups eCG 14 and eCG 9 were administered 200 IU of eCG intramuscularly. The percentage of females in heat 24-72 hours after CIDR removal was significantly higher in the eCG group compared to the non-eCG group.…”

Section: Discussionmentioning

confidence: 99%

The efficiency of induction and synchronisation of sexual desire in goats

Petrusha,

Skliarov,

Pérez-Marín

et al. 2022

TAVM

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One of the modern and widely used biotechnological methods for increasing the efficiency of animal reproduction is oestrus synchronization, which allows to reduce economic costs significantly. Using this method, a slight increase in the cost of processing animals is compensated by a significant decrease in labour costs, an increase in the technological efficiency of insemination and parturition, and the absence of costs for maintaining teasers. As a result, direct costs for reproduction might be reduced by a total of 50-60%. Induction and synchronization of sexual heat in goats have been used since the 1970s of the 20 th century, however, in our country, such a biotechnological method of regulating reproductive function is just beginning to be practised, but the results of such implementations are not available in the literary sources. Therefore, the goal of our research was to determine the effectiveness of oestrus induction and synchronization in goats under specific farm conditions in Ukraine. The experiments were conducted between April 2021 and February 2022 in «Agrosvit» dairy farm in Shestakove village, Chuguyiv district, Kharkiv region, on goats of Alpine and Zaanen breeds, aged 2-4 years, with a live weight of 35-55 kg. A total of 368 goats having ≤ 1 litre of milk production starting from the 180 th day of lactation, were involved in this trial. The synchronization protocol included the insertion of an intravaginal sponge with progestogen (day 0) (Chronogest CR polyester-polyurethane vaginal sponge, 20 mg of chronolone, intravaginally), injections of prostaglandin (Oestrophan, 0.2 ml, intramuscularly), and chorionic gonadotropin (Sergon, 500 OD, 1 ml, intramuscularly) (day 9), removal of the progesterone sponge (day 11), detection of heat (day 12) and insemination (day 13). Pregnancy diagnosis was determined by ultrasound examination on day 40 after artificial insemination. In our studies, using an oestrus induction and synchronization protocol based on progestogen sponge, prostaglandin and chorionic gonadotropin, 93.7% of treated goats were inseminated with a fertility rate of 158.9%. According to the results of the study, it can be concluded that oestrus induction and synchronization in goats is an effective biotechnological technique that allows increasing the efficiency of the use of genetic resources of high-value animals significantly, to increase the scale of their participation in the process of reproduction of livestock while maintaining a high level of physiological functions of the reproductive system. In particular, such studies will help to determine the most appropriate oestrus synchronization protocol and to better understand the effect on sexual behaviour and hormonal influence, and to inseminate goats at the most optimal time, in a short time, with a shortened period of kidding.

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“…In addition, an estrus examination was carried out every day by observing visual estrous signs and behaviours. Estrus is established when the does show clinical signs of estrus, i.e., reddening of vulva, swollen vulva and discharge from vulva, tail wagging, and standing to be mounted by a buck (Salleh et al, 2021).…”

Section: Methodsmentioning

confidence: 99%

Influence of refeeding on production, blood biochemistry parameters, and reproduction in underfed Kacang goat does

Widiyono

Yanuartono

Purnamaningsih

et al. 2022

Animal Physiology Nutrition

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This research aimed to investigate the effect of refeeding on production, blood biochemical parameters, and reproduction in underfed Kacang goat does. Twelve 2-3year-old Kacang goats scored (body condition score [BCS]: 1-1.5) with poor body condition but appeared healthy, gave normal births 3-4 months before but no longer nursing their youngs, and anestrus were used in this study. The experiment consisted of 110 days with 14 days of adaptation period and 96 days of feeding treatment and data collection. After the adaptation period, the animals were divided into two groups (A and B), with six animals each. During the first 40 days (underfeeding period), they were fed with kangkong (Ipomoea reptans) straw at a level of 2% of body weight (BW).For the following 56 days (refeeding period), each animal in group A was fed at the level of 4% BW per day while group B was fed at the level of 5% BW per day consisting of 50% kangkong straw and 50% concentrate. Feed intake, average daily gain, body condition, and estrus were assessed in the period of underfeeding and refeeding. Blood samples were collected at the end of the underfeeding and refeeding period for blood biochemical parameter analyses. During the underfeeding period, the animals were anestrous and had poor body condition (BCS: 1.17-1.33) and high serum levels of cortisol, progesterone, and estradiol. Refeeding resulted in a significant increase in BCS (2.75-3.0), restoring estrous cycle, and reduced serum cortisol and progesterone level (p < 0.05). The Kacang goats had good compensatory growth.It could be concluded that refeeding at the level of 4-5% BW would restore undernourished goats' clinical condition, productivity, and reproductive performance after 8 weeks of refeeding.

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Study of sexual behaviours with different types of estrus synchronization protocols in Boer goats

Cited by 6 publications

References 29 publications

Influence of repeated estrus synchronization treatment on hormone secretion, growth, and development of dairy goats

Influence of repeated estrus synchronization treatment on hormone secretion, growth, and development of dairy goats

The efficiency of induction and synchronisation of sexual desire in goats

Influence of refeeding on production, blood biochemistry parameters, and reproduction in underfed Kacang goat does

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