Effect of two routes of administration of human chorionic gonadotropin upon oestrus induction and reproductive outcomes in adult acyclic mix-breed goats

Rodríguez-Martínez, Rafael; Meza-Herrera, César A.; Tapia-Robles, K. I.; Alvarado-Espino, A.S.; Luna-Orozco, Juan Ramón; Leyva, Carlos; Mellado, Miguel; Véliz-Deras, Francisco Gerardo

doi:10.1080/09712119.2017.1284075

Cited by 7 publications

(5 citation statements)

References 26 publications

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“…Gonadotropin releasing hormone (GnRH) or human chorionic gonadotropin (hCG) injections are applied to improve the reproductive performance in anestrus goats (Medan et al, 2002;Rodríguez-Martínez et al, 2018). A strategy of reproductive performance included inducing estrus and ovulation (Cameron et al, 1988;Khan et al, 2003;González-Álvarez et al 2016).The hCG has an activity similar to luteinizing hormone (LH), while the GnRH acts on the pituitary gland, stimulates the release of LH and FSH and subsequently the secretion of steroid hormones from the gonads.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Hormonal Treatment Kisspeptin with GnRH and hCG on the some Reproductive Performance of Cyprus, Does during Non-Breeding Season

AL-Ameri¹

2019

Adv. Anim. Vet. Sci.

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Kisspeptins are the peptide product of the Kiss1 gene and act to stimulate GnRH secretion (Gottsch et al., 2004; Messager et al., 2005). Kisspeptins are located in the ovine brain in the arcuate nucleus (ARC) and the dorso-lateral preoptic area (POA) (Estrada et al., 2006; Franceschini et al., 2006; Smith et al., 2007). These ARC cells transmit sex-steroid feedback (both negative and positive) to the GnRH neurons (Smith, 2009). There is a considerable

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Section: Introductionmentioning

confidence: 99%

Comparison of Hormonal Treatment Kisspeptin with GnRH and hCG on the some Reproductive Performance of Cyprus, Does during Non-Breeding Season

AL-Ameri¹

2019

Adv. Anim. Vet. Sci.

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“…Goats in both management conditions were treated with an injectable P4 plus hCG-based protocol as previously described by Rodríguez-Martínez et al (2018). Briefly, goats were injected with 20 mg of P4 in oil adjuvant (0.4 mL/goat, Progesterona, Zoetis, Mexico), plus 100 IU of hCG (0.1 mL/ goat, Chorulon, Intervet, Mexico) 24 h later, administered by the intramuscular route and applied in the morning.…”

Section: Methodsmentioning

confidence: 99%

The Time of Artificial Insemination with Cooled Semen does not Affect the Pregnancy Rate in Anestrous Goats

Alvarado-Espino

Arellano-Rodríguez

et al. 2022

IJAR

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Background: The time of artificial insemination (AI) concerning ovulation is one of the main factors that affect the pregnancy rate. This study aimed to compare the time of AI with cooled semen in anestrous goats treated with progesterone (P4) plus hCG-based protocol and the effect of management condition on pregnancy rate. Methods: Forty-nine crossbred (local x dairy goats) and thirty-nine Alpine anestrous multiparous goats managed under extensive and intensive production systems respectively, were used (June, 25°N). Goats were treated with 20 mg of P4 followed by 100 IU of hCG 24 h later. On the day of hCG administration (Day 0), goats in each management system were allocated randomly to each of the two treatment groups. Goats in the first group received a fixed-time AI (FTAI) at 48 and 60 h after hCG whereas goats of the second group received a FTAI at 60 and 72 h with cooled semen. Goats were examined by transrectal ultrasonography (7.5 MHz) 45 days after AI to determine the pregnancy rate. Result: There was no significant difference in pregnant goats inseminated at 48 and 60 h (46.8%, 22/47) or 60 and 72 h (46.3%, 19/41) after hCG administration (P greater than 0.05). There was a tendency for a higher pregnancy rate in intensive compared to extensive management conditions (P=0.09) and no interaction was detected between the time of insemination and the management condition system (P greater than 0.05).

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“…Progestogens are usually administered using intravaginal devices, including silicone-based devices impregnated with progesterone (P4), such as Controlled Internal Drug Release (CIDR) and Dispositivo Intravaginal Caprino Ovino (DICO) ( Wheaton et al, 1993 ; Vilariño et al, 2010 ), or, intravaginal sponges (IVS) impregnated with progesterone analogues, as medroxyprogesterone acetate (MAP) or flurogestone acetate (FGA) ( Barrett et al, 2008 ; Santos et al, 2010 ). There are some preliminary studies on the administration of long-acting injectable progesterone ( Rodríguez-Martínez et al, 2018 ; Alvarado-Espino et al, 2019 ; Amaral D’Avila et al, 2022 ; Payan et al, 2022 ), but the results are still inconsistent. Until now, sponges impregnated with MAP have been used for the resynchronization protocol ( Miranda et al, 2018 ; Cosentino et al, 2019 , 2021 , 2022 ), but to the best of our knowledge, there are no studies with other progestogens.…”

Section: General Aspectsmentioning

confidence: 99%

Recent advances in treatments for resynchronization of ovulation in small ruminants: a review

et al. 2023

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Hormonal methodologies to control small ruminants’ estrous cycle are worldwide used and evolved, adjusting the application to the precise female physiological moments to enhance reproductive performance. The estrous cycle can be induced and/or synchronized, aiming for fixed-time artificial insemination, or based on estrus behavior signs for insemination, natural or guided mating. Successive protocols can be performed to resynchronize ovulation and increase reproductive outcomes in females that failed to conceive. These recently developed treatments aim to resynchronize the ovulation as earlier as non-pregnancy is detected. The present review aimed to summarize the recent advances and main findings regarding resynchronization protocols used in small ruminants. Lastly, we present future perspectives and new paths to be studied in the subject. The resynchronization treatment is still a growing field in small ruminant reproduction, nevertheless, some enhancements are found in the reproductive outcome, showing that such protocols can be successfully used in sheep and goat production.

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Effect of two routes of administration of human chorionic gonadotropin upon oestrus induction and reproductive outcomes in adult acyclic mix-breed goats

Abstract: Deras (2018) Effect of two routes of administration of human chorionic gonadotropin upon oestrus induction and reproductive outcomes in adult acyclic mix-breed goats,

Cited by 7 publications

References 26 publications

Comparison of Hormonal Treatment Kisspeptin with GnRH and hCG on the some Reproductive Performance of Cyprus, Does during Non-Breeding Season

Comparison of Hormonal Treatment Kisspeptin with GnRH and hCG on the some Reproductive Performance of Cyprus, Does during Non-Breeding Season

The Time of Artificial Insemination with Cooled Semen does not Affect the Pregnancy Rate in Anestrous Goats

Recent advances in treatments for resynchronization of ovulation in small ruminants: a review

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