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Fonte JS, Alonso MA, Junior MPM, Gonçalves MA, Pontes JH, Bordignon V, Fleury PDC, Fernandes CB. Successful equine in vitro embryo production by ICSI - effect of season, mares' age, breed, and phase of the estrous cycle on embryo production. Theriogenology 2024; 223:47-52. [PMID: 38669841 DOI: 10.1016/j.theriogenology.2024.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 04/15/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024]
Abstract
This retrospective study aimed at identifying factors that contribute to the success of equine in vitro embryo production by intracytoplasmic sperm injection (ICSI). A total of 7993 ovum pick-up (OPU) sessions were performed, totaling 2540 donor mares and semen from 396 stallions. Oocytes were aspirated at multiple sites in Brazil and were sent to the laboratory, within 6 h from OPU, in pre-maturation medium where they were in vitro matured (IVM) followed by ICSI and in vitro embryo culture for 7-8 days. The number of recovered oocytes, matured oocytes, cleaved embryos and blastocysts were used to explore the effect of age and breed of the donor mare, time of year in which the mare was aspirated and phase of the estrous cycle on the day of follicular aspiration. Mares between 6 and 15 years old were superior to other age groups in most parameters evaluated, including the average number of blastocysts per OPU. The impact of age was similar when evaluated within two breeds, American Quarter Horse (AQHA) and Warmblood mares. We observed that breed (AQHA, Warmblood, Crioulo, Lusitano and Mangalarga) had an important effect on most of the parameter evaluated, including number of oocytes recovered, blastocysts produced per OPU, and blastocyst rates. The overall impact of season was less pronounced than age and breed, with the only statistically significant difference being a higher rate of oocyte maturation during the summer season. Finally, most of the parameters evaluated were superior in follicular phase mares, with or without dominant follicle than luteal phase mares. In conclusion, this retrospective study revealed that breed, age, season and stage of estrous at the time of OPU are all important parameters for the success of equine embryo production by ICSI. This technology enables producing embryos all-year-round from mares of different breeds and ages from OPU-derived oocytes collected at multiple sites.
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Affiliation(s)
| | - Maria Augusta Alonso
- Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | | | | | | | - Vilceu Bordignon
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC, Canada
| | | | - Claudia Barbosa Fernandes
- Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil.
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Fanhani GG, Cavalieri FLB, Andreazzi MA, da Silva CI, Andreazzi KC, Pereira LDC, Emanuelli IP, Dos Santos JMG, Moreski DAB, Colombo AHB, Morotti F, Seneda MM. Progesterone Device Use Improves Ovum Pick-Up Efficiency in Acyclic Donors. J Equine Vet Sci 2023; 131:104933. [PMID: 37776919 DOI: 10.1016/j.jevs.2023.104933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/20/2023] [Accepted: 09/23/2023] [Indexed: 10/02/2023]
Abstract
The aim of this study was to evaluate follicular dynamics and ovum pick-up (OPU) efficacy in untreated mares or mares treated with an intravaginal progesterone (P4) device during seasonal anestrus (acyclic) and during the breeding season (cyclic). Six mares (mean age = 5 years), were recruited into an ovum pick-up scheme that was performed every 14 days with and without the P4 device, during the acyclic and cyclic phases. Aspirations amounted to seven procedures with or without the P4 device during each phase. Five ultrasound assessments were performed at each interval between the OPUs. Data on follicular number and diameter as well as the numbers of recovered and the percentage of recovered oocytes were also collected. The number of follicles from mares in the acyclic phase was higher (P < .005) regardless of the treatment. However, the follicular diameter was smaller for the P4 group (P < .005) from the 2nd to the 5th evaluation post-OPU procedure. The percentage of oocytes recovered during the acyclic phase was higher for mares treated with the P4 device (P < .005). The P4 device resulted in follicles with smaller diameters and facilitated OPU efficacy.
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Affiliation(s)
- Gabriela Genta Fanhani
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Fábio Luiz Bim Cavalieri
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Márcia Aparecida Andreazzi
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Caroline Isabela da Silva
- Programa de Pós-Graduação em Ciência de Alimentos, Universidade Estadual de Maringá (UEM), Maringá, Parana, Brazil
| | - Kelly Cristina Andreazzi
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Letícia da Costa Pereira
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Isabele Picada Emanuelli
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - José Maurício Gonçalves Dos Santos
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Danieli Aparecida Bobbo Moreski
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Antonio Hugo Bezerra Colombo
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Fábio Morotti
- Laboratório de Biotecnologia da Reprodução Animal, Universidade Estadual de Londrina (UEL), Londrina, Parana, Brazil
| | - Marcelo Marcondes Seneda
- Laboratório de Biotecnologia da Reprodução Animal, Universidade Estadual de Londrina (UEL), Londrina, Parana, Brazil.
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Dai S, Di Z, Li N, Zeng S. Optimization of recovery and maturation methods for cumulus-oocyte complexes in jennies. Reprod Domest Anim 2023; 58:168-175. [PMID: 36214091 DOI: 10.1111/rda.14276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/03/2022] [Accepted: 10/06/2022] [Indexed: 01/07/2023]
Abstract
Embryo production in donkeys is inefficient compared with that in other livestock. Obtaining a sufficient number of MII oocytes is the first step to solving this problem. In this study, the number, morphology and maturation rates of cumulus-oocyte complexes (COCs) obtained from abattoir-derived ovaries or live jennies were compared. The diameter of follicles from abattoir-derived ovaries was measured and divided into group 1 (2-6 mm), group 2 (6-10 mm), group 3 (10-20 mm), group 4 (20-28 mm) and group 5 (>28 mm). The results showed that the number of follicles per ovary in group 2 (3.6 ± 0.28) and 3 (4.2 ± 0.90) was higher than that in the other groups (p < .05). The recovery rate in group 3 was higher than group 1 (48.8% vs. 26.8%, p = .00), but lower than group 5 (48.8% vs. 76.5%, p = .025). The percentage of grade A COCs in group 3 was higher than group 2 (59.3% vs. 39.5%, p = .00) and group 1 (59.3% vs. 26.7%, p = .00). Moreover, the percentage of grade A COCs in group 4 (55.0%, p = .710) and group 5 (46.2%, p = .351) was reduced compared with that in group 3. From the above results, the developing follicles (group ovum pick-up [OPU], 10-20 mm) and preovulation follicles (group OPU-Preov, >35 mm) were aspirated from live jennies using OPU. Although there was no difference in the recovery rates of COCs between group 3 and OPU (48.8% vs. 43.0%, p = .184), the percentage of grades A COCs in group OPU was higher than group 3 (72.5% vs. 59.3%, p = .036). There was no difference in the maturation rate between group 3 and OPU (60.3% vs. 69.3%, p = .171) after the COCs matured in vitro. The rates of recovery (72.2%) and maturation (92.3%) in group OPU-Preov were higher than those in other groups (p < .05). Moreover, the effects of maturation time and serum type on maturation rates were evaluated in groups B44 (44 h, FBS), B36 (36 h, FBS) and D44 (44 h, foetal donkey serum, FDS). These results indicated that the maturation rate in group B36 was lower than group B44 (13.1% vs. 47.0%, p = .00) and group D44 (13.1% vs. 53.3%, p = .00). In conclusion, the quality of donkey COCs from OPU was higher than that from abattoir-derived ovaries, the suitable time of donkey in vitro maturation (IVM) was 44 h, and FBS could be replaced with FDS in donkey IVM medium.
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Affiliation(s)
- Shizhen Dai
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhengyang Di
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Nan Li
- Department of Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Shenming Zeng
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Catalán J, Martínez-Rodero I, Yánez-Ortiz I, Mateo-Otero Y, Bragulat AF, Nolis P, Carluccio A, Yeste M, Miró J. Metabolic profiling of preovulatory follicular fluid in jennies. Res Vet Sci 2022; 153:127-136. [PMID: 36356420 DOI: 10.1016/j.rvsc.2022.10.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/21/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022]
Abstract
Follicular fluid is formed from the transudation of theca and granulosa cells in the growing follicular antrum. Its main function is to provide an optimal intrafollicular microenvironment to modulate oocyte maturation. The aim of this study was to determine the metabolomic profile of preovulatory follicular fluid (PFF) in jennies. For this purpose, PFF was collected from 10 follicles of five jennies in heat. Then, PFF samples were analysed by nuclear magnetic resonance (NMR) and heteronuclear single quantum correlation (2D 1H/13C HSQC). Our study revealed the presence of at least 27 metabolites in the PFF of jennies (including common amino acids, carboxylic acids, amino acid derivatives, alcohols, saccharides, fatty acids, and lactams): 3-hydroxybutyrate, acetate, alanine, betaine, citrate, creatine, creatine phosphate, creatinine, ethanol, formate, glucose, glutamine, glycerol, glycine, hippurate, isoleucine, lactate, leucine, lysine, methanol, phenylalanine, proline, pyruvate, threonine, tyrosine, valine, and τ-methylhistidine. The metabolites found here have an important role in the oocyte development and maturation, since the PFF surrounds the follicle and provides it with the needed nutrients. Our results indicate a unique metabolic profile of the jennies PFF, as it differs from those previously observed in the PFF of the mare, a phylogenetically close species that is taken as a reference for establishing reproductive biotechnology techniques in donkeys. The metabolites found here also differ from those described in the TCM-199 medium enriched with fetal bovine serum (FBS), which is the most used medium for in vitro oocyte maturation in equids. These differences would suggest that the established conditions for in vitro maturation used so far may not be suitable for donkeys. By providing the metabolic composition of jenny PFF, this study could help understand the physiology of oocyte maturation as a first step to establish in vitro reproductive techniques in this species.
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Affiliation(s)
- Jaime Catalán
- Unit of Animal Reproduction, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Barcelona, Spain; Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, ES-17003 Girona, Spain; Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, ES-17003 Girona, Spain; Faculty of Veterinary Medicine, University of Teramo, Loc. Piano d'Accio, IT-64100 Teramo, Italy
| | - Iris Martínez-Rodero
- Unit of Animal Reproduction, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Barcelona, Spain
| | - Iván Yánez-Ortiz
- Unit of Animal Reproduction, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Barcelona, Spain; Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, ES-17003 Girona, Spain; Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, ES-17003 Girona, Spain
| | - Yentel Mateo-Otero
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, ES-17003 Girona, Spain; Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, ES-17003 Girona, Spain
| | - Ana Flores Bragulat
- Equine Production Laboratory, Faculty of Agronomy and Veterinary Medicine, National University of Río Cuarto, AR- X5800 Río Cuarto, Córdoba, Argentina
| | - Pau Nolis
- Nuclear Magnetic Resonance Facility, Autonomous University of Barcelona, Bellaterra, ES-08193 Cerdanyola del Vallès, Spain
| | - Augusto Carluccio
- Faculty of Veterinary Medicine, University of Teramo, Loc. Piano d'Accio, IT-64100 Teramo, Italy
| | - Marc Yeste
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, ES-17003 Girona, Spain; Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, ES-17003 Girona, Spain; Catalan Institution for Research and Advanced Studies (ICREA), ES-08010 Barcelona, Spain..
| | - Jordi Miró
- Unit of Animal Reproduction, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Barcelona, Spain.
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Campos-Chillon LF, Martin J, Altermatt JL. Pregnancy obtained in a late gestational mare by in vitro embryo production. Reprod Fertil Dev 2020; 31:1926-1929. [PMID: 31575386 DOI: 10.1071/rd19305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 09/02/2019] [Indexed: 11/23/2022] Open
Abstract
Recently, the demand for invitro embryo production in the horse has increased worldwide. Most clinical transvaginal ultrasound-guided ovum pick-up (OPU) procedures are performed in non-pregnant donor mares, and few experimental studies have described invitro embryo production from oocytes of pregnant donors 21-150 days in gestation. This report discusses OPU, follicular growth and invitro embryo production in a pregnant mare during late gestation.
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Affiliation(s)
- Lino Fernando Campos-Chillon
- Animal Science Department, California Polytechnic State University, 1 Grand Ave. San Luis Obispo, CA 93407, USA; and Corresponding author.
| | - Jan Martin
- Jan Martin Equine Management, PO Box 475, Buellton, CA 93427, USA
| | - Joy L Altermatt
- Animal Science Department, California Polytechnic State University, 1 Grand Ave. San Luis Obispo, CA 93407, USA; and Veterinary Reproduction Innovations, APC, PO Box 4712, San Luis Obispo, CA 93403, USA
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Cuervo-Arango J, Claes AN, Stout TAE. Mare and stallion effects on blastocyst production in a commercial equine ovum pick-up-intracytoplasmic sperm injection program. Reprod Fertil Dev 2020; 31:1894-1903. [PMID: 31634435 DOI: 10.1071/rd19201] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 09/12/2019] [Indexed: 11/23/2022] Open
Abstract
This study retrospectively examined the degree to which success within a commercial ovum pick-up (OPU)-intracytoplasmic sperm injection (ICSI) program varied between individual mares and stallions. Over 2 years, 552 OPU sessions were performed on 323 privately owned warmblood mares. For mares that yielded at least one blastocyst during the first OPU-ICSI cycle, there was a 77% likelihood of success during subsequent attempts; conversely, when the first cycle yielded no blastocyst, the likelihood of failure (no embryo) in subsequent cycles was 62%. In mares subjected to four or more OPU sessions, the mean percentage of blastocysts per injected oocyte was 20.5% (range 1.4-46.7%), whereas the mean number of blastocysts per OPU-ICSI session was 1.67 (0.2-4.2). Age did not differ significantly between mares that yielded good or poor results. The number of recovered oocytes per OPU was positively associated with the likelihood of success (P<0.001). Although there were considerable between-stallion differences, most stallions (14/16) clustered between 15.6% and 26.8% blastocysts per injected oocyte, and the number of blastocysts per OPU (mean 1.4; range 0.2-2.2) was less variable than among mares. In conclusion, although both mare and stallion affect the success of OPU-ICSI, mare identity and the number of oocytes recovered appear to be the most reliable predictors of success.
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Affiliation(s)
- Juan Cuervo-Arango
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 112, 3584CM Utrecht, Netherlands; and Corresponding author.
| | - Anthony N Claes
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 112, 3584CM Utrecht, Netherlands
| | - Tom A E Stout
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 112, 3584CM Utrecht, Netherlands
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Deleuze S, Douet C, Couty I, Moros-Nicolás C, Barrière P, Blard T, Reigner F, Magistrini M, Goudet G. Ovum Pick Up and In Vitro Maturation of Jennies Oocytes Toward the Setting Up of Efficient In Vitro Fertilization and In Vitro Embryos Culture Procedures in Donkey ( Equus asinus ). J Equine Vet Sci 2018. [DOI: 10.1016/j.jevs.2018.03.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Influence of transvaginal ultrasound-guided follicular punctures in the mare on heart rate, respiratory rate, facial expression changes, and salivary cortisol as pain scoring. Theriogenology 2016; 86:1757-63. [PMID: 27354340 DOI: 10.1016/j.theriogenology.2016.05.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 05/24/2016] [Accepted: 05/27/2016] [Indexed: 11/20/2022]
Abstract
Transvaginal ultrasound-guided follicular punctures are widely used in the mare for diagnosis, research, and commercial applications. The objective of our study was to determine their influence on pain, stress, and well-being in the mare, by evaluating heart rate, breath rate, facial expression changes, and salivary cortisol before, during, and after puncture. For this experiment, 21 pony mares were used. Transvaginal ultrasound-guided aspirations were performed on 11 mares. After injections for sedation, analgesia, and antispasmodia, the follicles from both ovaries were aspirated with a needle introduced through the vagina wall into the ovary. In the control group, 10 mares underwent similar treatments and injections, but no follicular aspiration. Along the session, heart rate and breath rate were evaluated by a trained veterinarian, ears position, eyelid closure, and contraction of facial muscles were evaluated, and salivary samples were taken for evaluation of cortisol concentration. A significant relaxation was observed after sedative injection in the punctured and control mares, according to ear position, eyelid closure, and contraction of facial muscles, but no difference between punctured and control animals was recorded. No significant modification of salivary cortisol concentration during puncture and no difference between punctured and control mares at any time were observed. No significant modification of the breath rate was observed along the procedure for the punctured and the control mares. Heart rate increased significantly but transiently when the needle was introduced in the ovary and was significantly higher at that time for the punctured mares than that for control mares. None of the other investigated parameters were affected at that time, suggesting discomfort is minimal and transient. Improving analgesia, e.g., through a multimodal approach, during that possibly more sensitive step could be recommended. The evaluation of facial expression changes and heart rate is easy-to-use and accurate tools to evaluate pain and well-being of the mare.
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Establishment of conditions for ovum pick up and IVM of jennies oocytes toward the setting up of efficient IVF and in vitro embryos culture procedures in donkey (Equus asinus). Theriogenology 2016; 86:528-35. [DOI: 10.1016/j.theriogenology.2016.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 02/01/2016] [Accepted: 02/03/2016] [Indexed: 01/08/2023]
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Iacono E, Merlo B, Rizzato G, Mislei B, Govoni N, Tamanini C, Mari G. Effects of repeated transvaginal ultrasound–guided aspirations performed in anestrous and cyclic mares on P4 and E2 plasma levels and luteal function. Theriogenology 2014; 82:225-31. [DOI: 10.1016/j.theriogenology.2014.03.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 03/03/2014] [Accepted: 03/26/2014] [Indexed: 11/16/2022]
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Andrés G, Javier J, Florencia K, De Stéfano A, Salamone DF. Effect of collection–maturation interval time and pregnancy status of donor mares on oocyte developmental competence in horse cloning1. J Anim Sci 2014; 92:561-7. [DOI: 10.2527/jas.2013-7026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- G. Andrés
- Laboratory of Animal Biotechnology, Faculty of Agronomy, University of Buenos Aires, Buenos Aires, C1417DSE, Argentina
- National Institute of Scientific and Technological Research, Buenos Aires, C1033AAJ, Argentina
| | - J. Javier
- Laboratory of Animal Biotechnology, Faculty of Agronomy, University of Buenos Aires, Buenos Aires, C1417DSE, Argentina
| | - K. Florencia
- Laboratory of Animal Biotechnology, Faculty of Agronomy, University of Buenos Aires, Buenos Aires, C1417DSE, Argentina
| | - A. De Stéfano
- Laboratory of Animal Biotechnology, Faculty of Agronomy, University of Buenos Aires, Buenos Aires, C1417DSE, Argentina
| | - D. F. Salamone
- Laboratory of Animal Biotechnology, Faculty of Agronomy, University of Buenos Aires, Buenos Aires, C1417DSE, Argentina
- National Institute of Scientific and Technological Research, Buenos Aires, C1033AAJ, Argentina
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Velez IC, Arnold C, Jacobson CC, Norris JD, Choi YH, Edwards JF, Hayden SS, Hinrichs K. Effects of repeated transvaginal aspiration of immature follicles on mare health and ovarian status. Equine Vet J 2012:78-83. [DOI: 10.1111/j.2042-3306.2012.00606.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Recovery of mare oocytes on a fixed biweekly schedule, and resulting blastocyst formation after intracytoplasmic sperm injection. Theriogenology 2010; 73:1116-26. [DOI: 10.1016/j.theriogenology.2010.01.013] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2009] [Revised: 12/04/2009] [Accepted: 01/05/2010] [Indexed: 11/18/2022]
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14
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Blanco I, Devito L, Ferreira H, Araujo G, Fernandes C, Alvarenga M, Landim-Alvarenga F. Aspiration of equine oocytes from immature follicles after treatment with equine pituitary extract (EPE) alone or in combination with hCG. Anim Reprod Sci 2009; 114:203-9. [DOI: 10.1016/j.anireprosci.2008.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2008] [Revised: 08/15/2008] [Accepted: 09/05/2008] [Indexed: 10/21/2022]
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15
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Collection Rates and Morphology of Equine Oocytes Obtained from Immature Follicles after Treatment with Equine Pituitary Extract (EPE) and Human Chorionic Gonadotropin. J Equine Vet Sci 2009. [DOI: 10.1016/j.jevs.2009.07.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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