Reproduction in female wild cattle: Influence of seasonality on ARTs

Mastromonaco, Gabriela F.; Gonzalez-Grajales, Antonio L.

doi:10.1016/j.theriogenology.2020.02.016

Cited by 18 publications

(10 citation statements)

References 68 publications

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“…Nonetheless, the existing studies offer sufficient data for moderator analysis of treatment type and time, parity, and initial fertility. Other factors may impact the pregnancy rate, including the season [ 64 ], nutritional status [ 65 ], BCS [ 65 ], and transferred embryo status (produced in vitro or in vivo, fresh or thawed). For example, the type of embryos (fresh/thawed/semi) and temperature (normal/heat-stressed) may compromise the initial fertility of controls.…”

Section: Discussionmentioning

confidence: 99%

Impact of Accessory Corpus Luteum Induced by Gonadotropin-Releasing Hormone or Human Chorionic Gonadotropin on Pregnancy Rates of Dairy Cattle following Embryo Transfer: A META-Analysis

Chen

Hou

Zhu

et al. 2023

Veterinary Sciences

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The circulation of progesterone (P4) concentrations of recipients has positive correlations with embryo survival and pregnancy success of embryo transfer (ET) in dairy cows. One strategy to improve P4 concentration is the administration of gonadotropin-releasing hormone (GnRH) or human chorionic gonadotropin (hCG), thereby inducing the formation of accessory corpus luteum (CL). This study aimed at determining the efficacy of GnRH or hCG treatment regarding embryo transfer (ET) and providing a better clinical veterinary practice guidance. A meta-analysis was conducted on the data from 2048 treated recipient cows and 1546 untreated cows. By inducing the formation of accessory CL with GnRH (100 µg), GnRH analogue Buserelin (8–10 µg), or hCG (≥1500 IU) 5–11 days after synchronized ovulation, hCG alone achieved an improvement (RR = 1.39, p < 0.05), while GnRH and GnRH analogue did not result in significant changes (RR = 1.04, p = 0.26). Treatment with GnRH or hCG 5–7 days after synchronized ovulation was associated with increased chances of pregnancy compared with later treatment (11–14 days). Owing to the treatment, the pregnancy rate of cows with very poor fertility (<40%) was improved, while that of cows with good fertility (≥40%) was not affected. Treatment with GnRH or hCG greatly improved pregnancy rates of parous lactating cows (RR = 1.32, p < 0.05) compared with heifers (RR = 1.02, p > 0.05). Additionally, as indicated by pregnancy loss analysis, the treatment had no benefit on late embryo/early fetus survival at days 28–81. In conclusion, the induction of accessory CL with GnRH or hCG may benefit fertility and have important implications for the management of reproductive performance in the dairy industry.

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Section: Discussionmentioning

confidence: 99%

Impact of Accessory Corpus Luteum Induced by Gonadotropin-Releasing Hormone or Human Chorionic Gonadotropin on Pregnancy Rates of Dairy Cattle following Embryo Transfer: A META-Analysis

Chen

Hou

Zhu

et al. 2023

Veterinary Sciences

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“…Oestradiol benzoate treatment can induce a new synchronized follicle wave emergence and increase the pregnancy rate of resynchronized non‐pregnant heifers (Motta et al., 2020). Reproductive seasonality, driven by either photoperiod or nutritional resource availability, has a significant influence on the success of assisted reproductive technologies on wild cattle (Mastromonaco & Gonzalez‐Grajales, 2020). Progesterone was directly linked to undersized deviation, but the progesterone effect on decreasing future largest subordinate follicle diameter occurs independently of the progesterone effects on follicle‐stimulating hormone and luteinizing hormone concentrations (Gomez‐Leon et al., 2020).…”

Section: Discussionmentioning

confidence: 99%

A comparative transcriptome and proteomics study of post‐partum ovarian cycle arrest in yaks (Bos grunniens)

Huo

Zhou

et al. 2021

Reprod Domestic Animals

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Post‐partum ovarian cycle arrest is the main factor affecting yak reproductive efficiency. There are few reports regarding the molecular regulatory mechanism of post‐partum oestrus at transcriptome and proteome levels in yaks. Our previous studies focussed on the ovaries of yaks with post‐partum ovarian cycle arrest and post‐partum oestrus yaks. In this study, RNA sequencing transcriptomic study was combined with quantitative proteomic analyses to identify post‐partum ovarian cycle‐related genes and proteins. Consequently, 1,149 genes and 24 proteins were found to be up‐ or downregulated during post‐partum oestrus. The analysis of differentially regulated genes identified three gene or protein pairs that were synchronously upregulated and no gene or protein pairs that were synchronously downregulated, suggesting that these upregulated genes may regulate the post‐partum ovarian cycle. The functional classification of these differentially expressed genes and proteins indicated their connection with the oocyte meiosis, the oestrogen signalling pathway, the progesterone‐mediated oocyte maturation and the gonadotrophin‐releasing hormone (GnRH) signalling pathway. In this study, a total of six genes and two proteins involved in the oocyte meiosis, the oestrogen signalling pathway, the progesterone‐mediated oocyte maturation and the GnRH signalling pathway were identified. The CSNK1A1, M91_09723, M91_11326, M91_21439, M91_19073, SHC2, Atf6b, M91_03062, HSPCA and calmodulin could regulate oestrus, respectively, in the post‐partum so as to control the anoestrus status.

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“…Estradiol benzoate treatment can induce a new synchronized follicle wave emergence and increase the pregnancy rate of resynchronized non-pregnant heifers [34]. Reproductive seasonality, driven by either photoperiod or nutritional resource availability, has a signi cant in uence on the success of assisted reproductive technologies on wild cattle [35]. Progesterone was directly linked to undersized deviation but the progesterone effect on decreasing future largest subordinate follicle diameter occurs independently of the progesterone effects on follicle stimulating hormone and luteinizing hormone concentrations [36].…”

Section: Hormone and Postpartum Anestrus Of Yaksmentioning

confidence: 99%

A Comparative Transcriptome and Proteomics Study of Postpartum Ovarian Cycle Arrest in Yaks

Huo

Yang

Zhaxi

et al. 2020

Preprint

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Background: Postpartum ovarian cycle arrest is the main factor affecting yak reproductive efficiency. There are few reports regarding the molecular regulatory mechanism of postnatal estrus on transcriptome and proteome in yaks. Our previous studies focused on the ovaries of yaks with postnatal ovarian cycle arrest and postnatal estrus yaks. In this study, RNA sequencing transcriptomic was combined with quantitative proteomic analyses to identify postpartum ovarian cycle-related genes and proteins.Results: Consequently 1,149 genes and 24 proteins were found to be up- or downregulated during postnatal estrus. The analysis of differentially regulated genes identified three gene or protein pairs that were synchronously upregulated and no gene or protein pairs that were synchronously downregulated, suggesting that these upregulated genes may regulate the postpartum ovarian cycle. The functional classification of these differentially expressed genes and proteins indicated their connection with oocyte meiosis, the estrogen signaling pathway, progesterone-mediated oocyte maturation and the gonadotrophin releasing hormone (GnRH) signaling pathway. Conclusions: In this study, a total of six genes and two proteins involved in the oocyte meiosis, the estrogen signaling pathway, progesterone-mediated oocyte maturation and the GnRH signaling pathway were identified. This is the first report of a comprehensive transcriptomic and proteomic analysis of postnatal estrus on Yaks.

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Reproduction in female wild cattle: Influence of seasonality on ARTs

Cited by 18 publications

References 68 publications

Impact of Accessory Corpus Luteum Induced by Gonadotropin-Releasing Hormone or Human Chorionic Gonadotropin on Pregnancy Rates of Dairy Cattle following Embryo Transfer: A META-Analysis

Impact of Accessory Corpus Luteum Induced by Gonadotropin-Releasing Hormone or Human Chorionic Gonadotropin on Pregnancy Rates of Dairy Cattle following Embryo Transfer: A META-Analysis

A comparative transcriptome and proteomics study of post‐partum ovarian cycle arrest in yaks (Bos grunniens)

A Comparative Transcriptome and Proteomics Study of Postpartum Ovarian Cycle Arrest in Yaks

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