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Novelties in Ovine Assisted Reproductive Technologies – A Review. MACEDONIAN VETERINARY REVIEW 2022. [DOI: 10.2478/macvetrev-2022-0018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Artificial insemination (AI) as a part of assisted reproductive technologies represents the oldest and most widespread method used to accelerate genetic progress in all domestic animals. After its first implementation in ovine reproduction and almost 80 years afterward, AI is continuously used for improving the genetic merit, utilizing either fresh or short-time chilled semen. Nevertheless, regardless of the semen used for insemination, the conception rate (CR) is still lower in comparison to natural service. At least two factors are commonly thought to limit the success of the AI and reduce the CR: (1) failure of placing the semen directly into the uterus due to the specific anatomic structure of the ewe’s cervix; (2) lower viability of ram spermatozoa during cryopreservation (<30% progressively motile spermatozoa after thawing). This review elaborates on recent studies that aimed to achieve acceptable CR through the implementation of cervical or intrauterine insemination: deep intracervical, intrauterine trans-cervical, and intracornual. Several hormonal treatments (oxytocin, estrogen, or prostaglandin) were evaluated on inducing cervical dilation that facilitates insemination. A comprehensive analysis was given to the effects of several antioxidants (GSSG, GSH, and cysteine) supplemented in ram semen-freezing media. Sex-sorted ram semen fertility rate results were presented from our studies.
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Fernandes DP, Rossetto R, Montenegro AR, Fernandes CCL, Bravo PA, Moreno ME, Cavalcanti CM, Kubota GA, Rondina D. Effectiveness of near-infrared spectroscopy as a non-invasive tool to discriminate spectral profiles of in vitro cultured oocytes from goats. Anim Reprod 2021; 18:e20200255. [PMID: 34925556 PMCID: PMC8677351 DOI: 10.1590/1984-3143-ar2020-0255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 10/29/2021] [Indexed: 11/24/2022] Open
Abstract
Here, we aimed to discriminate between the spectral profiles of spent culture media after oocyte in vitro maturation (IVM) and culture (IVC) from goats of different ages subjected to repeated hormonal treatments. The profiles were discriminated using near infrared (NIR) spectroscopy combined with multivariate methods. A total of 19 goats (young = 10; old = 9) were subjected to serial hormonal stimulation (HS) with gonadotropins. Cumulus oophorus complexes (COCs) were collected using laparoscopic ovum pick-up (LOPU) and subjected to IVM and parthenogenetic activation. The initial embryos were subjected to IVC. Spent culture media were collected after oocyte IVM and on day 2 of IVC and analyzed using NIR spectroscopy. NIR spectral data were interpreted through chemometric methods, such as principle component analysis (PCA) and partial least square discriminant analysis (PLS-DA). The results of PCA analysis clearly showed a separation in the spectral profiles between the experimental groups (HS sessions; young and old animals) both after IVM and IVC. Overall, the main absorption bands were attributed to the C-H group second overtone, first overtone of O-H and N-H, and C-H combinations and may serve as molecular markers. On the other hand, the spectral data obtained using PLS-DA models provided a better classification of the groups. The results showed the possibility of discriminating young and old groups as well as the three HS sessions with high specificity, sensitivity, and accuracy using NIR spectra. Thus, the culture medium analysis using NIR spectroscopy combined with multivariate methods indicated the dissimilarities between the groups and provided an insight into the in vitro development of goat oocytes. This technique serves as an efficient, objective, rapid, and non-invasive method to discriminate spectral profiles.
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Affiliation(s)
- Denilsa Pires Fernandes
- Laboratório de Nutrição e Produção de Ruminantes, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Rafael Rossetto
- Laboratório de Nutrição e Produção de Ruminantes, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Assis Rubens Montenegro
- Laboratório de Nutrição e Produção de Ruminantes, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | | | - Pamela Angela Bravo
- Laboratório de Nutrição e Produção de Ruminantes, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Maria Eugenia Moreno
- Laboratório de Nutrição e Produção de Ruminantes, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Camila Muniz Cavalcanti
- Laboratório de Nutrição e Produção de Ruminantes, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Guilherme Araújo Kubota
- Laboratório de Nutrição e Produção de Ruminantes, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Davide Rondina
- Laboratório de Nutrição e Produção de Ruminantes, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
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Follicular response and oocyte production following variations in ovarian stimulation in goats. Theriogenology 2018; 108:88-96. [DOI: 10.1016/j.theriogenology.2017.11.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 11/08/2017] [Accepted: 11/12/2017] [Indexed: 11/30/2022]
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Zhang H, Cheng GH, Li YJ, Cai MY, Guo HY, Qin KL. Superovulation and expression of follicle-stimulating hormone receptor in young rabbit females. WORLD RABBIT SCIENCE 2017. [DOI: 10.4995/wrs.2017.4485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
<p>To optimise the use of juvenile in vitro embryo transfer technologies in young rabbit females, superovulation was performed in New Zealand White young rabbit females at different ages and the expression mode of follicle-stimulating hormone receptor (FSHR) was explored using real-time quantitative polymerase chain reaction, and in vitro maturation (IVM) together with fertilisation (IVF) was conducted immediately after superovulation. The results showed that (1) the age factor significantly affected superovulation in young rabbit females, with 60 d as an optimal age; (2) the mRNA level of FSHR exhibited a rising trend, though it was lower at 30 to 40 d of age; (3) the maturation rate of the oocytes from 60 d old rabbits was significantly higher than in those from 50 d old rabbits; (4) the fertilisation rate of oocytes was not significantly different among rabbits 50, 60 and 70 d old.</p>
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Bartlewski P, Murawski M, Schwarz T, Oliveira M. Effect of altering the intervals between consecutive superovulatory doses of porcine follicle-stimulating hormone on ovarian responses and embryo yields in anestrous ewes. Anim Reprod Sci 2017; 180:44-49. [DOI: 10.1016/j.anireprosci.2017.03.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 03/03/2017] [Indexed: 11/26/2022]
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Souza S, Alves B, Alves K, Santos J, Diogenes Y, Bhat M, Melo L, Freitas V, Teixeira D. Relationship of Doppler velocimetry parameters with antral follicular population and oocyte quality in Canindé goats. Small Rumin Res 2016. [DOI: 10.1016/j.smallrumres.2016.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Expression of cumulus-oocyte complex genes and embryonic development in goats subjected to progestogen-based estrus synchronization. Theriogenology 2016; 86:612-8. [DOI: 10.1016/j.theriogenology.2016.02.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 02/13/2016] [Accepted: 02/17/2016] [Indexed: 11/20/2022]
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Paramio MT, Izquierdo D. Recent advances in in vitro embryo production in small ruminants. Theriogenology 2016; 86:152-9. [DOI: 10.1016/j.theriogenology.2016.04.027] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 11/19/2015] [Accepted: 03/14/2016] [Indexed: 10/21/2022]
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Souza-Fabjan JMG, Locatelli Y, Duffard N, Corbin E, Batista RITP, de Figueirêdo Freitas VJ, Beckers JF, Mermillod P. Intrinsic quality of goat oocytes already found denuded at collection for in vitro embryo production. Theriogenology 2016; 86:1989-98. [PMID: 27453560 DOI: 10.1016/j.theriogenology.2016.06.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Revised: 06/07/2016] [Accepted: 06/17/2016] [Indexed: 01/09/2023]
Abstract
Although cumulus cells are essential for efficient oocyte maturation, the establishment of protocols that support IVD of embryos obtained from denuded oocytes (DOCs) is important for optimizing the use of reproductive biotechnologies. Thus, this study aimed to establish a protocol for IVD of goat DOC using different strategies of IVM and methods of oocyte activation. Four experiments were performed. Similar developmental competence of slaughterhouse DOC was obtained, regardless of maturation media (complex, semidefined or simplified). However, the ability to reach the blastocyst stage was affected by the activation method. Denuded oocytes subjected to parthenogenetic activation had greater (P < 0.05) development capacity, compared with those undergoing IVF with average cleavage rate of 83% and 75%, blastocyst rate of 49% and 28%, and blastocysts in relation to the cleaved embryos of 59% and 38, respectively. In addition, the quality of embryos evaluated after vitrification/warming was similar between parthenogenetic activation and IVF. Finally, we demonstrated that the coculture of cumulus-oocyte complex (COC) with DOC increased the competence of DOC at a ratio of 1:1 and 1:9 (DOC:COC). We believe that presence of cumulus cells (CCs) is not essential to the meiotic maturation, if at the time of removal of the oocyte from follicular environment, they already acquired competence to development. However, when the oocytes still need to acquire competence, the presence of CC may significantly contribute in their developmental capacity acquisition during IVM. Thus, regardless of the source, these oocytes will require longer time in IVM, contrary to what happens in the absence of CC. In conclusion, although DOC had a lower developmental potential, especially after IVF, they were able to produce blastocysts and the coculture of DOC with COC increased this developmental capacity.
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Affiliation(s)
- Joanna Maria Gonçalves Souza-Fabjan
- INRA, UMR7247, Physiologie de la Reproduction et des Comportements, INRA, CNRS, Université de Tours, Haras Nationaux, Nouzilly, France; Laboratory of Physiology and Control of Reproduction, Veterinary School, State University of Ceará, Fortaleza, CE, Brazil.
| | - Yann Locatelli
- INRA, UMR7247, Physiologie de la Reproduction et des Comportements, INRA, CNRS, Université de Tours, Haras Nationaux, Nouzilly, France; Museum National d'Histoire Naturelle, Réserve de la Haute Touche, Obterre, France
| | - Nicolas Duffard
- INRA, UMR7247, Physiologie de la Reproduction et des Comportements, INRA, CNRS, Université de Tours, Haras Nationaux, Nouzilly, France; Museum National d'Histoire Naturelle, Réserve de la Haute Touche, Obterre, France
| | - Emilie Corbin
- INRA, UMR7247, Physiologie de la Reproduction et des Comportements, INRA, CNRS, Université de Tours, Haras Nationaux, Nouzilly, France
| | | | | | - Jean-François Beckers
- Laboratory of Endocrinology, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Pascal Mermillod
- INRA, UMR7247, Physiologie de la Reproduction et des Comportements, INRA, CNRS, Université de Tours, Haras Nationaux, Nouzilly, France
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Paramio MT, Izquierdo D. Current status of in vitro embryo production in sheep and goats. Reprod Domest Anim 2015; 49 Suppl 4:37-48. [PMID: 25277431 DOI: 10.1111/rda.12334] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 04/17/2014] [Indexed: 11/26/2022]
Abstract
Sheep and goat production is an important economic activity in Spain with an increasing interest in milk production. Multiovulation and Embryo Transfer (MOET) and In vitro Embryo Production (IVEP) are assisted reproductive technologies aimed at increasing the genetic diffusion of females. In vitro embryo production is a multi-step methodology comprising the following procedures: (i) In vitro Maturation (IVM) of oocytes recovered directly from the follicles, (ii) In vitro Fertilization (IVF) or co-incubation of capacitated spermatozoa with in vitro matured oocytes and (iii) In vitro culture (IVC) of zygotes up to the blastocyst stage. In vitro embryo production from oocytes recovered from prepubertal females is called JIVET (Juvenile in vitro Embryo Transfer) and allows shortened generation intervals and increased genetic gain. Embryo production together with embryo cryoconservation would allow large-scale embryo marketing, a pathogen-free genetic movement and easier and cheaper germplasm commercial transactions. Commercial Embryo activity in small ruminants is low compared to cows in the European Union (data from the European Embryo Transfer Association) and in the world (data from the International Embryo Transfer Association). There is less IVEP research in small ruminants compared to other livestock species. The aim of this review was to provide an overview of the current status of IVEP of small ruminant with an emphasis on (i) description of the main methodologies currently used for IVM, IVF and IVC of embryos (ii) comparing procedures and outputs from JIVET and IVEP of adult females and (iii) the future research perspectives of this technology.
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Affiliation(s)
- M-T Paramio
- Department of Animal and Food Sciences, University Autonomous of Barcelona, Barcelona, Spain
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Puri G, Chaudhary SS, Singh VK, Sharma AK. Effects of fetal bovine serum and estrus buffalo serum on maturation of buffalo (Bubalus bubalis) oocytes in vitro. Vet World 2015; 8:143-6. [PMID: 27047063 PMCID: PMC4774694 DOI: 10.14202/vetworld.2015.143-146] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 12/22/2014] [Accepted: 12/30/2014] [Indexed: 11/16/2022] Open
Abstract
AIM The aim was to assess the effects of fetal bovine serum (FBS) and estrus buffalo serum (EBS) on in vitro maturation rate of oocytes in buffalo. MATERIALS AND METHODS Maturation rate of oocytes was assessed in two maturation media supplemented with 20% FBS and EBS. Oocytes maturation rate was evaluated on the basis of cumulus cell expansion and extrusion of polar body after 24 h of in vitro culture in CO2 incubator. RESULTS The average percentage of in vitro matured oocytes in FBS was 83.80%, and EBS was 77.45%, respectively. The results revealed a significant (p<0.05) increase in maturation rate of oocytes in FBS than EBS. CONCLUSION Buffalo oocytes were better in vitro matured in FBS than EBS.
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Affiliation(s)
- Gopal Puri
- Department of Veterinary Physiology & Biochemistry, Vanbandhu College of Veterinary Science & Animal Husbandry, Navsari Agricultural University, Navsari - 396 450, Gujarat, India
| | - S S Chaudhary
- Department of Veterinary Physiology & Biochemistry, Vanbandhu College of Veterinary Science & Animal Husbandry, Navsari Agricultural University, Navsari - 396 450, Gujarat, India
| | - V K Singh
- Department of Veterinary Physiology & Biochemistry, Vanbandhu College of Veterinary Science & Animal Husbandry, Navsari Agricultural University, Navsari - 396 450, Gujarat, India
| | - A K Sharma
- Department of Veterinary Physiology & Biochemistry, Vanbandhu College of Veterinary Science & Animal Husbandry, Navsari Agricultural University, Navsari - 396 450, Gujarat, India
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Souza-Fabjan JMG, Locatelli Y, Duffard N, Corbin E, Touzé JL, Perreau C, Beckers JF, Freitas VJF, Mermillod P. In vitro embryo production in goats: Slaughterhouse and laparoscopic ovum pick up–derived oocytes have different kinetics and requirements regarding maturation media. Theriogenology 2014; 81:1021-31. [DOI: 10.1016/j.theriogenology.2014.01.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Revised: 01/15/2014] [Accepted: 01/17/2014] [Indexed: 10/25/2022]
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de Souza-Fabjan JMG, Panneau B, Duffard N, Locatelli Y, de Figueiredo JR, Freitas VJDF, Mermillod P. In vitro production of small ruminant embryos: late improvements and further research. Theriogenology 2014; 81:1149-62. [PMID: 24650929 DOI: 10.1016/j.theriogenology.2014.02.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 01/28/2014] [Accepted: 02/01/2014] [Indexed: 10/25/2022]
Abstract
Beyond the potential use of in vitro production of embryos (IVP) in breeding schemes, embryos are also required for the establishment of new biotechnologies such as cloning and transgenesis. Additionally, the knowledge of oocyte and embryo physiology acquired through IVP techniques may stimulate the further development of other techniques such as marker assisted and genomic selection of preimplantation embryos, and also benefit assisted procreation in human beings. Efficient in vitro embryo production is currently a major objective for livestock industries, including small ruminants. The heterogeneity of oocytes collected from growing follicles by laparoscopic ovum pick up or in ovaries of slaughtered females, remains an enormous challenge for IVM success, and still limits the rate of embryo development. In addition, the lower quality of the IVP embryos, compared with their in vivo-derived counterparts, translates into poor cryosurvival, which restricts the wider use of this promising technology. Therefore, many studies have been reported in an attempt to determine the most suitable conditions for IVM, IVF, and in vitro development to maximize embryo production rate and quality. This review aims to present the current panorama of IVP production in small ruminants, describing important steps for its success, reporting the recent advances and also the main obstacles identified for its improvement and dissemination.
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Affiliation(s)
- Joanna Maria Gonçalves de Souza-Fabjan
- INRA, Physiologie de la Reproduction et des Comportements, Nouzilly, France; Faculty of Veterinary, Laboratory of Physiology and Control of Reproduction (LFCR), State University of Ceará, Fortaleza, Ceara, Brazil.
| | - Barbara Panneau
- INRA, Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Nicolas Duffard
- INRA, Physiologie de la Reproduction et des Comportements, Nouzilly, France; Museum National d'Histoire Naturelle, Réserve de la Haute Touche, Obterre, France
| | - Yann Locatelli
- INRA, Physiologie de la Reproduction et des Comportements, Nouzilly, France; Museum National d'Histoire Naturelle, Réserve de la Haute Touche, Obterre, France
| | - José Ricardo de Figueiredo
- Faculty of Veterinary, Laboratory of Manipulation of Oocyte and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, Ceara, Brazil
| | | | - Pascal Mermillod
- INRA, Physiologie de la Reproduction et des Comportements, Nouzilly, France
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Assessment of the reproductive parameters, laparoscopic oocyte recovery and the first embryos produced in vitro from endangered Canindé goats (Capra hircus). Reprod Biol 2013; 13:325-32. [DOI: 10.1016/j.repbio.2013.09.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 09/26/2013] [Accepted: 09/28/2013] [Indexed: 11/19/2022]
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Teixeira IAM, Gomes RA, Castagnino DS, Figueiredo FODM, Härter CJ, Biagioli B, Silva SPD, Rivera ADR. Inovações tecnológicas na caprinocultura. REVISTA BRASILEIRA DE SAÚDE E PRODUÇÃO ANIMAL 2013. [DOI: 10.1590/s1519-99402013000100012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
O largo crescimento do setor de agronegócios no Brasil tem estimulado mudanças nos sistemas produtivos, tanto na intensificação, como na profissionalização da produção. Dessa forma, os produtores têm buscado estratégias para melhor atender aos desafios da atividade pecuária atual, dentre as quais se destacam as inovações tecnológicas que devem resultar em comprovado benefício à atividade, seja pelo aumento em produtividade, seja pela melhoria na qualidade dos produtos, seja pela conscientização do respeito ao meio ambiente. Assim como em outros segmentos do agronegócio brasileiro, na caprinocultura existe uma demanda crescente pela aplicação de inovações tecnológicas, uma vez que o sistema produtivo precisa ser mais competitivo para se manter no mercado. Dentre as inovações tecnológicas aplicadas na caprinocultura, foram abordadas as mais relevantes nas áreas de reprodução (desde métodos para indução de cio até a prática da transgenia), melhoramento genético (biogenética), sanidade (inovações no diagnóstico e prevenção de doenças de maior impacto na criação), nutrição (inovações nos sistemas de alimentação) e tratamento de dejetos (diminuição de contaminantes no ambiente). A utilização conjunta das inovações tecnológicas nos diferentes segmentos associados à cadeia produtiva caprina pode fazer com que ocorram melhorias nos rebanhos assim como nos produtos gerados.
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López-Saucedo J, Paramio-Nieto MT, Fierro R, Piña-Aguilar RE. Intracytoplasmic sperm injection (ICSI) in small ruminants. Anim Reprod Sci 2012; 133:129-38. [PMID: 22871330 DOI: 10.1016/j.anireprosci.2012.07.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 06/29/2012] [Accepted: 07/12/2012] [Indexed: 12/23/2022]
Abstract
Small ruminants are an important component of the global production systems of meat and wool, and their reproductive biology is well known. However, the incorporation of assisted reproduction techniques (ART) in the production systems of small ruminants is not as well developed as for other domestic species. Normally, production systems that incorporate ARTs are restricted to artificial insemination or in vivo embryo transfer. Intracytoplasmic sperm injection (ICSI) is one of the ARTs techniques reported for small ruminants and consists of the injection of spermatozoa inside an oocyte, bypassing the natural process of sperm-oocyte interaction. In goats and sheep, there are few live births by ICSI reported, with no reports from other species of small ruminants. Currently, there has not been intensive research about ICSI in small ruminants. However, ICSI has potentially important applications in animal production systems, primarily its use with semen of valued animals, with epididymal sperm, in the fertilization of prepubertal or cryopreserved oocytes. Other applications include more advanced techniques, such as transgenic-ICSI or its combination with spermatogonial transplantation. In this article, we review the "state of the art" of this technique in small ruminants including its historical development, research needs for its improvement and future applications.
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Affiliation(s)
- J López-Saucedo
- Doctoral Program in Biological Sciences and Health, Universidad Autónoma Metropolitana-Iztapalapa, México City, Mexico
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Romaguera R, Moll X, Morató R, Roura M, Palomo M, Catalá M, Jiménez-Macedo A, Hammami S, Izquierdo D, Mogas T, Paramio M. Prepubertal goat oocytes from large follicles result in similar blastocyst production and embryo ploidy than those from adult goats. Theriogenology 2011; 76:1-11. [DOI: 10.1016/j.theriogenology.2010.12.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 12/15/2010] [Accepted: 12/21/2010] [Indexed: 11/29/2022]
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Gama L, Bressan M. Biotechnology applications for the sustainable management of goat genetic resources. Small Rumin Res 2011. [DOI: 10.1016/j.smallrumres.2011.03.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ovarian follicular response to different hormonal stimulation treatments in Canindé goats. Anim Reprod Sci 2011; 125:88-93. [DOI: 10.1016/j.anireprosci.2011.02.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Revised: 02/01/2011] [Accepted: 02/14/2011] [Indexed: 11/22/2022]
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