scholarly journals Reproductive aspects of the male jaguar (Panthera onca): A review

2021 ◽  
Author(s):  
E. López-Pérez ◽  
F. Cortés-Villavicencio ◽  
C. Muñoz-García ◽  
J. Gallegos-Sánchez ◽  
Alejandro Ávalos-Rodríguez
Keyword(s):  
In Vitro Fertilization ◽  
Assisted Reproduction ◽  
Reproductive System ◽  
Artificial Insemination ◽  
Relevant Information ◽  
Panthera Onca ◽  
Leopardus Pardalis ◽  
Assisted Reproduction Techniques ◽  
Vitro Fertilization

Objective: To describe the anatomy, morphology and physiology of the reproductive system of male jaguars, as well as assisted reproduction techniques. Methodology: A literature review on the anatomy and morphology of the jaguar´s reproductive system, its physiological characteristics and assisted reproduction techniques were carried out to document relevant information on the topic. Results: With this review, basic aspects of the morphology of the reproductive system of the jaguars are disclosed, although scarce knowledge is available on their reproduction. The advances in the collection, evaluation and cryopreservation of semen of this feline are shown, in addition to assisted reproduction techniques such as artificial insemination and in vitro fertilization, which have a great potential to safeguard the species. Study limitations: The jaguar, an emblematic species of Latinamerica, is an endangered species, like other wild felids species as ocelot (Leopardus pardalis) and margay (Leopardus wiedii), which makes it necessary to have a national assisted reproduction program. However, for this to be possible, information about their reproductive physiology is necessary, which is complicated in wild animals and even more so because the reproductive mechanisms greatly differ between felids species. There is scarce information in this regard from its free-living or Mexican zoos, it is for this reason necessary to generate such information. Conclusions: It is necessary to continue working on designing protocols for artificial insemination and other assisted reproduction techniques such as in-vitro fertilization specifically for male Panthera onca.

scholarly journals PP-25 EVOLUTION IN METHOD OF IN VITRO FERTILIZATION (CLASSICAL IVF OR ICSI) IN ASSISTED REPRODUCTION TECHNIQUES IN SPAIN

2012 ◽  
Vol 24 ◽  
pp. S14
Author(s):  
Yolanda Cabello ◽  
Esther Vidal ◽  
Fernando Prados ◽  
María José De Los Santos ◽  
Francisca Luceño ◽  
...  
Keyword(s):  
In Vitro Fertilization ◽  
Assisted Reproduction ◽  
Assisted Reproduction Techniques ◽  
Vitro Fertilization

scholarly journals The Role of MEMS in In-Vitro-Fertilization

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
I. D. Wijegunawardana ◽  
Y. W. R. Amarasinghe
Keyword(s):  
In Vitro Fertilization ◽  
Assisted Reproduction ◽  
Success Rates ◽  
Assisted Reproduction Techniques ◽  
Vitro Fertilization ◽  
Viable Solution ◽  
Micro Electromechanical System ◽  
Experienced Individual

The assisted reproduction has been considered a viable solution for the infertility of humankind for more than four decades. In-Vitro-Fertilization (IVF) is one of the most successful assisted reproduction techniques, where the reproductive cell of the female partner is fertilized outside of her body. Initially, the IVF process has been conducted manually by an experienced embryologist. However, even with a highly experienced individual, the operation had extremely lower success rates due to the limited control in environmental conditions and the requirement of precise movements. Therefore, to address this technological deficit, the feasibility of the mechatronics devices for IVF procedures has been investigated. Among the different mechatronics concepts, micro-electromechanical system (MEMS) technologies have been gradually attracted to the IVF process and improved its capabilities. The purpose of this paper is to present a brief overview of the role of MEMS technologies in IVF. The article classifies the MEMS technologies in IVF based on their application in order to emphasize its contribution. In addition, the article extensively discusses the state-of-the-art mechatronic techniques utilized in Intracytoplasmic Sperm Injection (ICSI), one of the most popular techniques used in IVF. This review article expects to become extremely beneficial for the engineering researchers new to this field who seek critical information on IVF in simple terms with highlights on the possible advancements and challenges that may emerge in the future.

scholarly journals Euthyroid Hyperthyrotropinemia in Children Born after in Vitro Fertilization

2009 ◽  
Vol 94 (4) ◽  
pp. 1338-1341 ◽  
Author(s):  
Sophia D. Sakka ◽  
Ariadne Malamitsi-Puchner ◽  
Dimitrios Loutradis ◽  
George P. Chrousos ◽  
Christina Kanaka-Gantenbein
Keyword(s):  
In Vitro Fertilization ◽  
Assisted Reproduction ◽  
Primary Hypothyroidism ◽  
Thyroid Peroxidase ◽  
Thyroglobulin Antibodies ◽  
Assisted Reproduction Techniques ◽  
Vitro Fertilization ◽  
Serum T3

Abstract Context: Assisted reproduction techniques are now commonly used. Although classic in vitro fertilization (IVF) started almost 30 yr ago, few long-term systematic prospective studies of children conceived with assisted reproduction have been performed. Objective: Our objective was to investigate thyroid function in children conceived after IVF vs. naturally conceived controls. Populations and Methods: A total of 106 children conceived after classic IVF and 68 naturally conceived controls, aged 4–14 yr, were studied. All children were thoroughly examined, and serum T3, T4, TSH, anti-thyroid peroxidase, and anti-thyroglobulin antibodies were measured. A second TSH determination and a thyroid ultrasound were performed for TSH higher than 5 μIU/ml, and children were considered to have persistent hyperthyrotropinemia, if the TSH elevation was confirmed. Results: Seven IVF children but none of the controls had persistent elevations of circulating TSH, suggesting euthyroid hyperthyrotropinemia or subclinical primary hypothyroidism (P = 0.044). TSH was significantly higher in the IVF group than in controls (P = 0.046), whereas no significant differences in the concentrations of T3 or T4 were observed. None of the children had detectable circulating antithyroid antibodies in either group. Conclusions: A significant elevation of serum TSH compatible with a mild TSH resistance of the thyroid were found in IVF children compared with controls. This was not due to the presence of antithyroid autoantibodies. We suggest that this might represent a slight epigenetic developmental abnormality related to the preimplantation manipulation of the embryo. Further studies are needed to confirm these findings and to better determine their etiopathogenesis and clinical significance.

scholarly journals What shapes public attitudes towards assisted reproduction technologies?

2018 ◽  
Author(s):  
Maja Djundeva ◽  
Ivett Szalma
Keyword(s):  
In Vitro Fertilization ◽  
Assisted Reproduction ◽  
Artificial Insemination ◽  
Fixed Effects ◽  
Age At First Birth ◽  
Vitro Fertilization ◽  
Country Level ◽  
Assisted Reproduction Technologies ◽  
The Impact

This paper contributes to the literature on social acceptance of artificial insemination and in-vitro fertilization, the two most prominent examples of Assisted Reproduction Technologies (ART) in Europe and direct attention to several previously under-researched aspects. The empirical base of this study is the fourth round of the European Values Study (EVS), conducted in 2008-2010 in 43 countries. Using multilevel fixed-effects linear regressions, we examine the impact of several individual and country-level characteristics on the agreement level with the statement that artificial insemination or in-vitro fertilization can always be justified, never be justified or something in between. According to our findings there are strong relationships between attitudes towards ART and socio-demographic variables, as well as religiousness and individual attitudes such as traditional family formation practices, "justification of homosexuality", (non-)preference for homosexual neighbours and acceptance of adoption by homosexual couples. As for the country level variables we found significant effect in case of those variables which are related to social changes within the concept Second Demographic Transitions such as mean age at first birth and secularization but GDP did not have any significant effects.

scholarly journals Artificial insemination and in-vitro fertilization using donor spermatozoa: a report on 15 years of experience

1997 ◽  
Vol 12 (4) ◽  
pp. 722-726 ◽  
Author(s):  
G. N. Clarke ◽  
H. Bourne ◽  
P. Hill ◽  
W. I. Johnston ◽  
A. Speirs ◽  
...  
Keyword(s):  
In Vitro Fertilization ◽  
Artificial Insemination ◽  
Years Of Experience ◽  
Vitro Fertilization

scholarly journals 106 GENOMIC IMPRINTING OF IGF2R IN TISSUES OF BOVINE FETUSES GENERATED BY ARTIFICIAL INSEMINATION OR IN VITRO FERTILIZATION

2005 ◽  
Vol 17 (2) ◽  
pp. 204 ◽  
Author(s):  
S. Hiendleder ◽  
D. Bebbere ◽  
S. Bauersachs ◽  
M. Stojkovic ◽  
H. Wenigerkind ◽  
...  
Keyword(s):  
In Vitro Fertilization ◽  
Artificial Insemination ◽  
Expression Patterns ◽  
Allelic Expression ◽  
Paternal Allele ◽  
Specific Gene ◽  
Vitro Fertilization ◽  
Bovine Fetuses ◽  
Parent Of Origin

The insulin-like growth factor 2 receptor gene (IGF2R) is involved in fetal growth regulation. A study in sheep associated fetal overgrowth after in vitro embryo culture with abnormal DNA methylation and expression of IGF2R (Young et al. 2001 Nat. Genet. 27, 153–154). This suggested that abnormal IGF2R imprinting is a major cause of fetal overgrowth. To test this hypothesis in bovine fetuses, we developed a microsatellite marker for IGF2R from cDNA sequence data and screened 45 Day-80 fetuses generated in vivo, by artificial insemination (AI), or in vitro, by in vitro fertilization (IVF) procedures, for parent-of-origin-specific gene expression. A total of 17 fetuses were heterozygous, but available parental DNA samples showed that only 12 (8 AI, 4 IVF) allowed unambiguous discrimination of parental alleles. Parent-of-origin-specific allelic expression patterns indicated that bovine IGF2R was expressed predominantly from the maternal allele and thus imprinted in fetal heart, kidney, liver, lung, muscle, and cotyledon tissue. However, the relative amount of expression from the paternal allele was tissue-specific and ranged from 6.4 ± 0.8% in skeletal muscle up to 27.4 ± 0.9% in cotyledon (SPSS or 11.5, ANOVA, P < 0.001). Tissues that originated from the same germ layer showed similar allelic expression ratios whereas significantly different expression ratios (P < 0.05) were observed between tissues originating from different germ layers. Contrary to expectations from sheep data, there was no evidence for gross abnormalities in IGF2R imprinting in tissues from overgrown (n = 2) or normal sized (n = 2) IVF fetuses. However, relative paternal expression levels in several tissues showed significant relationships (P < 0.05–0.001) with growth parameters and pointed to subtle changes in paternal IGF2R expression in overgrown IVF fetuses. We thank W. Scholz and M. Weppert for excellent technical assistance.

In-vitro fertilization with donor sperm after failure of artificial insemination

1987 ◽  
Vol 2 (2) ◽  
pp. 121-125 ◽  
Author(s):  
M. Vekemans ◽  
Y. Englert ◽  
M. Camus ◽  
G. de Maertelaer
Keyword(s):  
In Vitro Fertilization ◽  
Artificial Insemination ◽  
Donor Sperm ◽  
Vitro Fertilization
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