Review: Early and late determinants of puberty in ruminants and the role of nutrition

Duittoz, Anne; Kenny, David A.

doi:10.1016/j.animal.2023.100812

Cited by 4 publications

(2 citation statements)

References 73 publications

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“…Similarly, LH influences the growth of dominant follicles and oocytes while triggering the apoptosis of preantral follicles ( 18 , 29 ). Additionally, GH can synergise with FSH and LH, promoting follicle maturation and oocyte excretion ( 30 , 31 ). Our investigation revealed no substantial differences in plasma levels of FSH, LH, GH, or GnRH between 1- and 3-PMSG does during the estrus cycle and pregnancy periods ( p > 0.05).…”

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 findings align with those ofGomes et al (2022), which indicate that the gestation period of Javanese goats in the Municipality of Covalima is five months. Goats' gestation duration is influenced by a number of parameters, such as birth weight, sex and number of foetuses(Adhianto et al, 2019), nutrition(Duittoz and Kenny, 2023), and foetus size(Hafez and Hafez, 2013). The length of the goats' gestation cycle may also be influenced by good management(Heluth et al, 2021).Litter Size: Number of kids born per birth is known as litter size.…”

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confidence: 99%

Reproductive performance of local goats in Municipality of Liquica

Freitas,

Amaral

et al. 2024

World J. Biol. Biotechnol.

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One of the small ruminants with a lot of promise and popularity in the Municipality of Liquica are kacang goats. The purpose of this study is to determine how well the local goats in Liquica Municipality reproduce. In this study, a quantitative approach was taken. The research location was chosen using the purposive sampling method. The criterion of having at least three goats and five years of experience with them were used to choose the responders for this study. Solvin's formula was employed to ascertain the sample size. The variables that were observed were the kidding interval, size of the litter, length of pregnancy, and age at puberty. The findings demonstrated that the local goats in Tibar Village had good reproductive performance. Of the 71 respondents, they reported that the average age at puberty was 6.51 ± 0.65, the average gestation period was 5.08 ± 0.28, the average litter size was 1.08 ± 0.36, and the average calving interval was 8.86±0.59. Ulmera Village respondents, numbering seventy, stated that the local goats' puberty age was 7.84 ± 0.93, their gestation period was 5.09 ± 0.28, their litter size was 1.6 ± 0.48, and their calving interval was 8.56 ± 0.53. In Liquisa Municipality, the reproductive performance of Javanese goats is deemed satisfactory despite farmers' continued adherence to customary rearing practices.

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Editorial: Recent scientific advances in reproduction and fertility in ruminants: an overview of the 11th International Ruminant Reproduction Symposium, Galway, Ireland, 2023

Lonergan

Beltman

Butler

et al. 2023

animal

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Review: Early and late determinants of puberty in ruminants and the role of nutrition

Cited by 4 publications

References 73 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

Reproductive performance of local goats in Municipality of Liquica

Editorial: Recent scientific advances in reproduction and fertility in ruminants: an overview of the 11th International Ruminant Reproduction Symposium, Galway, Ireland, 2023

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