Exogenous progestogen does not affect first-wave follicle populations and oocyte quality during ovarian stimulation with FSH in sheep

Bragança, G. M.; Souza-Fabjan, J. M. G.; Ribeiro, Lilian dos Santos; Brair, Viviane Lopes; Cortês, Luana Rangel; Souza, Célia Alves de; Batista, Ríbrio Ivan Tavares Pereira; Fonseca, J. F. da; Menchaca, A.; Brandão, Felipe Zandonadi

doi:10.1016/j.domaniend.2019.06.001

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…This period in small ruminant species extends from three weeks pre-partum to three weeks post-partum (Tharwat et al, 2013). The decrease and disruptions of ovarian follicles growth and development and the quality of their containing oocytes, growth performance, and feed digestibility, metabolites, and hormones' profiles were observed during this period (Bragança et al, 2020;…”

mentioning

confidence: 94%

Effects of Moringa oleifera on Follicular Development, Blood and Metabolic Profiles of Subtropical Ewes during Peripartum

Al-Mufarji¹,

Mohammed²,

Al-Zeidi³

et al. 2022

AAVS

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T he peripartum stage which is known as the transition period is the most critical for the immediate and long-term performance of pregnant animals and their deliveries. This period in small ruminant species extends from three weeks pre-partum to three weeks post-partum (Tharwat et al., 2013). The decrease and disruptions of ovarian follicles growth and development and the quality of their containing oocytes, growth performance, and feed digestibility, metabolites, and hormones' profiles were observed during this period (Bragança et al., 2020;

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mentioning

confidence: 94%

Effects of Moringa oleifera on Follicular Development, Blood and Metabolic Profiles of Subtropical Ewes during Peripartum

Al-Mufarji¹,

Mohammed²,

Al-Zeidi³

et al. 2022

AAVS

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“…Several studies concerning the nutrition and feed additives, hormonal supplementation indicated that they were pivotal factors in determining the ovarian follicle development and oocyte quality that resulted in varied reproductive performances in different animal species and human (Mohammed 2018(Mohammed , 2019Mohammed et al, 2022;2024a,b,c,d;Ali et al, 2021;Al-Mufarji et al, 2022a,b;Mohammed and Al-Suwaiegh 2023;Al-Mafurji et al, 2023). Bragança et al (2020) found that progestogen administered to sheep did not affect the pattern of ovarian first wave follicle populations and the resulting oocyte quality during ovarian stimulation with FSH. Primordial follicle activation and survival during in vitro culture of bovine ovarian tissue to control oxidative stress upon melatonin treatment was confirmed through different mechanisms (Silva et al, 2024).…”

mentioning

confidence: 88%

The Potential Impacts of Selecting Viable Oocytes on Further Embryonic Development in Mammals: A Review

Mohammed,

Al-Suwaieg,

AlGherair

et al. 2024

IJAR

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Selecting viable fully grown germinal and matured oocytes were positively effect on further embryonic development and live birth. The use of feed and hormonal supplementation and biotechnologies to enhance oocyte competence was evaluated. In addition, the oocytes were selected based on ovarian follicular stage, follicles and oocytes morphology, follicular fluid characters and gene expression. Changes were obtained in oocyte maturation, fertilization and further embryo cleavage and development over selecting viable oocytes. The larger follicle diameter, the translucent follicle and the higher blood supply the higher developmental competence of resulting oocytes. The higher surrounding cumulus cells and homogeneity of cytoplasm the higher developmental competence of oocytes. In addition, oocytes obtained during luteal stage compared to those obtained during follicular phase were highly or comparably developed to embryos. Furthermore, follicular fluid characters and gene expression might predict the embryonic developmental competence of oocytes in addition to their viable staining with brilliant cresyl blue. In conclusion, the characters of ovarian follicles, oocytes, follicular fluid and gene expression have significant implications on further oocyte developmental competence in different mammalian species.

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“…A total of 12 healthy adult Chinese Hu sheep (1.5-2.5-year-old), procured in April 2023 from the Inner Mongolia JinLai Animal Husbandry Technology Co., Ltd. (Hohhot, Inner Mongolia), were subjected to hormonal treatment as described by Bragança [67]. The animals received a progestogenreleasing device for 6 d before the initiation of superovulation by FSH soon after normal ovulation, i.e., during the emergence of the first follicular wave.…”

Section: Ovarian Stimulation and Oocyte Collectionmentioning

confidence: 99%

Single-Cell Transcriptome Analysis Reveals Development-Specific Networks at Distinct Antral Follicle Stages in Sheep Oocytes

Song,

Zhang,

Zhang

et al. 2023

Preprint

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The development of the ovarian antral follicle is a complex, highly regulated process. Oocytes orchestrate and coordinate the development of mammalian ovarian follicles, and the rate of follicular development is governed by a developmental program intrinsic to the oocyte. Characterizing oocyte signatures during this dynamic process is critical for understanding oocyte maturation and follicular development. Although the transcriptional signature of sheep oocytes matured in vitro and preovulatory oocytes have been previously described, the transcriptional changes of oocytes in antral follicles have not. Here, we used single-cell transcriptomics (SmartSeq2) to characterize sheep oocytes from small, medium, and large antral follicles. We characterized the transcriptomic landscape of sheep oocytes during antral follicle development, identifying unique features in the transcriptional atlas, stage-specific molecular signatures, oocyte-secreted factors, and transcription factor networks. Notably, we identified specific gene and signaling pathways in each antral follicle stage that may reflect oocyte quality and in vitro maturation competency. Additionally, we discovered key biological processes that drive the transition from small to large antral follicles, revealing hub genes involved in follicle recruitment and selection. Thus, our work provides a comprehensive characterization of the single-oocyte transcriptome, filling a gap in the mapping of the molecular landscape of sheep oogenesis. We also provide key insights into the transcriptional regulation of the critical stages of antral follicular development, which is essential for understanding how the oocyte orchestrates follicular development.

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Exogenous progestogen does not affect first-wave follicle populations and oocyte quality during ovarian stimulation with FSH in sheep

Cited by 5 publications

References 10 publications

Effects of Moringa oleifera on Follicular Development, Blood and Metabolic Profiles of Subtropical Ewes during Peripartum

Effects of Moringa oleifera on Follicular Development, Blood and Metabolic Profiles of Subtropical Ewes during Peripartum

The Potential Impacts of Selecting Viable Oocytes on Further Embryonic Development in Mammals: A Review

Single-Cell Transcriptome Analysis Reveals Development-Specific Networks at Distinct Antral Follicle Stages in Sheep Oocytes

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