Fifteen minutes of daily contact with sexually active male induces ovulation but delays its timing in seasonally anestrous goats

Ramírez, Sergio; Bedos, Marie; Chasles, Manon; Hernández, H.; Flores, Jerónimo Landeros; Vielma, Jesús; Duarte, Gerardo; Retana-Marquez, M.S.; Keller, Matthieu; Chemineau, Philippe; Delgadillo, J.A.

doi:10.1016/j.theriogenology.2016.08.019

Cited by 11 publications

(5 citation statements)

References 27 publications

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“…In contrast, other studies from a subtropical latitude with local goats argue that few a days of contact were enough to stimulate estrus behavior in adult goats (Martinez-Alfaro et al, 2014;Ponce et al, 2015). Furthermore in the present study, the percentage of goats (that ranged from 44 to 70%) displaying estrus behavior was lower than in adult goats at the beginning of the breeding season (higher than 90%) (Bedos et al, 2014;Martinez-Alfaro et al, 2014;Ramirez et al, 2017). These results indicate that prepubertal goats need longer male stimulus to reach sexual and estrus behavior compared to adult goats.…”

Section: Discussioncontrasting

confidence: 95%

“…This result indicate that the male effect extended the period of normal cycle length. Similar variations with a short cycle followed by a normal cycle were reported by previous studies that worked with the male effect (Chemineau, Pellicer-Rubio, Lassoued, Khaldi, & Monniaux, 2006;Bedos et al, 2014;Ramirez et al, 2017). For this reason, the intervals between estrus observed in the present study were consistent with other studies (Menchaca & Rubianes, 2001;Fatet et al, 2011;.…”

Section: Discussionsupporting

confidence: 93%

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Influence of male on estrus behavior, estradiol and progesterone release and puberty onset on prepubertal Saanen goats

Augusto

Rodrigues

Merighe

et al. 2020

SCA

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The present study investigated the male effect on the estrus behaviors, estradiol and progesterone release in prepubertal Saanen goats. Twenty-nine female Saanen goats at 135 ± 10 days old with body weight of 22.8 ± 3.3 Kg were randomly assigned to three treatments: exposure to sexually active male (male treatment), exposure to androgenized females (androgenized female treatment), and prepubertal goats isolated from active male and androgenized females (control treatment). Sexual behaviors associated with estrus were recorded daily, and blood samples were taken weekly to determine estradiol and progesterone concentrations over 24 weeks. The experimental goats subjected to male or androgenized female had significantly higher frequency of estrus (mount acceptance) (P ? 0,02), progesterone (P ? 0,01), and estradiol (P ? 0,01) release than the control goats. Furthermore, goats exposed to a male showed estrus behavior two weeks earlier and maintained this estrus behavior for three weeks more than goats of both female and control treatments. Estrus was observed in 70 % of goats in male and female treatments during the breeding season versus 44 % of the control goats. Finally, significantly more goats subjected to male treatment (60 % of goats) showed progesterone concentrations higher than 1 ng mL-1 (which indicates the presence of a functional corpus luteum) compared to the female and control treatment (40 and 22 % of goats, respectively). These results shows that male treatment significantly increased the number of females showing estrus behavior, estradiol and progesterone release, and the number of animals with a functional corpus luteum, anticipating puberty for experimental goats, suggesting that the male effect could be used to anticipate the onset of puberty in goats.

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Section: Discussioncontrasting

confidence: 95%

Section: Discussionsupporting

confidence: 93%

Influence of male on estrus behavior, estradiol and progesterone release and puberty onset on prepubertal Saanen goats

Augusto

Rodrigues

Merighe

et al. 2020

SCA

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“…Combined with gestational demands, this promotes additional stress, leading to longer postpartum anoestrus (21,59). Eloy et al (2003) stated that after uterine involution, a female might be ready to begin a new pregnancy, but lactation and nutrition-associated factors contribute to extending the postpartum anoestrus, highlighting the importance of these two factors on uterine involution.…”

Section: Uterine Involutionmentioning

confidence: 99%

“…The first ovarian cycle after an anoestrus period in goats is not preceded by the usual oestrous activity and both the duration and concentration of progesterone secretion by the corpus luteum are generally lower than normal (17). In ewes, the first two ovulations are of poor quality, due to the low pulsatility of FSH, due to the fact that the small follicles have a low number of granulosa cells, which produce low levels of estradiol, which may explain the possible absence of sexual receptivity prior to the first ovulation (33), known as "silent ovulation" (59).…”

Section: Hormones and Oestrous Behaviour After Birthmentioning

confidence: 99%

“…The main factors influencing postpartum anoestrus are: 1) uterine involution, 2) lack of positive feedback from the hypothalamus-pituitary-ovarian axis causing reduction of ovarian activity after parturition and return to oestrus, 3) lactation period, 4) pre-and postpartum state of nutrition of the mother, 5) body condition and 6) environmental causes, such as heat stress and social interactions (39,59). This review aims to clarify how these factors are related to reproductive physiology, endocrinology and follicular dynamics and in turn, how they influence the return of postpartum ovarian activity in goats.…”

Section: Introductionmentioning

confidence: 99%

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Factors affecting postpartum ovarian activity of goats in tropical semi-arid region

et al. 2021

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There have been few studies on the use of diets and strategies to reduce the length of postpartum anoestrus in dairy goats, especially in tropical semi-arid regions. This review discusses the factors influencing the return of postpartum ovarian activity in goats. During the postpartum period, goats are in puerperal anoestrus and their reproductive tract is being prepared for a new conception. Anoestrus is necessary for tissue renewal in the uterus (uterine involution) associated with the return of cyclic ovarian activity, and is influenced by factors such as suckling of the offspring, social interactions, body condition score (BCS) before and after birth, intensity of negative energy balance (NEB) and stress from adverse climatic conditions. The anoestrus period can be extended by delays in the resumption of reproductive activity of females in puerperium. The duration of puerperal anoestrus in goats directly affects the productivity of the herd and is mainly influenced by nutrition, lactation period and heat stress. To minimize the negative effects of postpartum anoestrus on productivity, we recommend a mating season and a plan for the kidding period, as well as a program to monitor the body condition score during pregnancy so that the animals will have a better BCS at parturition. To minimize the effects of a negative energy balance, we suggest nutritional supplementation with levels of energy above the requirements for maintenance. Highlights The duration of postpartum anoestrus in goats is influenced by nutrition and body condition score. Heat stress can intensify the negative energy balance, consequently increased the period of anoestrus. Puerperal anoestrus occurs as a result of tissue renewal in the uterus. Suckling of the offspring associated with the period of lactation and social interactions can modified the puerperal anoestrus period. Use of diets and strategies to reduce the postpartum anoestrus in goats.

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Reproductive and Milk Production Profiles in Serrana Goats

Simões

Bauer

2017

Sustainable Goat Production in Adverse Environments: Volume II

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Fifteen minutes of daily contact with sexually active male induces ovulation but delays its timing in seasonally anestrous goats

Cited by 11 publications

References 27 publications

Influence of male on estrus behavior, estradiol and progesterone release and puberty onset on prepubertal Saanen goats

Influence of male on estrus behavior, estradiol and progesterone release and puberty onset on prepubertal Saanen goats

Factors affecting postpartum ovarian activity of goats in tropical semi-arid region

Reproductive and Milk Production Profiles in Serrana Goats

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