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https://www.readbyqxmd.com/read/28820408/-thrombophilic-genetic-mutations-and-polymorphisms-in-women-with-infertility-and-failed-in-vitro-fertilization
#1
G Abrahamyan
Occurrence of pregnancy after in vitro fertilization depends of two components: functional adequacy of the embryo at the blastocyst stage and receptivity of endometrium, which, according to modern perception, are determinate in achieving optimal conditions of implantation. From the pregnancy occurrence point of view, as well as in regard to its further development , implantation is the most crucial phase of IVF/ICSI and ET. As the same time, this phase is also the most vulnerable. Multiple researches have proven the role of mother thrombophilia for genesis of gestation complications and early embryo losses, but in relation to this problem i the context of IVF there is still a lot to be detailed...
July 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28819136/the-possible-molecular-mechanisms-of-bisphenol-a-action-on-porcine-early-embryonic-development
#2
Jing Guo, Ming-Hui Zhao, Kyung-Tae Shin, Ying-Jie Niu, Yong-Dae Ahn, Nam-Hyung Kim, Xiang-Shun Cui
Bisphenol A (BPA) is an environmental contaminant widely used in the plastic industry. BPA has been demonstrated to be an endocrine disruptor and has an adverse effect on the embryonic development of mammals. However, the mechanism of action of BPA is limited. In this study, we investigated the role and mechanism of BPA in porcine embryonic development. First, the parthenotes were treated with different concentrations of BPA. We found that blastocyst formation was impaired and the parthenotes were arrested at the 4-cell stage after treatment with 100 μm BPA...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28815355/egg-donation-of-vitrified-oocytes-bank-produces-similar-pregnancy-rates-by-blastocyst-transfer-when-compared-to-fresh-cycle
#3
Thais S Domingues, Ana Paula Aquino, Bruna Barros, Raquel Mazetto, Mariana Nicolielo, Carolina M Kimati, Talita Devecchi, Tatiana C S Bonetti, Paulo C Serafini, Eduardo L A Motta
PURPOSE: Advances in reproductive techniques, mainly the introduction of oocyte vitrification, have provided the opportunity to conceive from oocyte banks. The aim of this study was to compare the clinical outcomes of fresh and vitrified oocytes in an egg donation program following blastocyst transfer. METHODS: This retrospective observational study included 504 oocyte donation cycles. All donor women were younger than 30 years of age. The recipient cycles were divided into two groups: fresh oocytes (n = 78) or vitrified oocytes (n = 426)...
August 16, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28814615/single-cell-gene-expression-of-the-bovine-blastocyst
#4
Veronica M Negrón-Pérez, Yanping Zhang, Peter J Hansen
The first two differentiation events in the blastocyst result in three cell types - epiblast, trophectoderm (TE), and hypoblast. The purpose here was to identify molecular markers for each cell type in the bovine and evaluate differences in gene expression among individual cells of each lineage. The cDNA from 67 individual cells from dissociated blastocysts was used to determine transcript abundance for 96 genes implicated as cell lineage markers in other species or potentially involved in developmental processes...
August 16, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28811525/totipotency-segregates-between-the-sister-blastomeres-of-two-cell-stage-mouse-embryos
#5
E Casser, S Israel, A Witten, K Schulte, S Schlatt, V Nordhoff, M Boiani
Following fertilization in mammals, it is generally accepted that totipotent cells are exclusive to the zygote and to each of the two blastomeres originating from the first mitotic division. This model of totipotency was inferred from a minority of cases in which blastomeres produced monozygotic twins in mice. Was this due to experimental limitation or biological constraint? Here we removed experimental obstacles and achieved reliable quantification of the prevalence of dual totipotency among mouse two-cell stage blastomeres...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810691/improvement-of-implantation-potential-in-mouse-blastocysts-derived-from-ivf-by-combined-treatment-with-prolactin-epidermal-growth-factor-and-4-hydroxyestradiol
#6
Miki Takeuchi, Misato Seki, Etsuko Furukawa, Akihito Takahashi, Kyosuke Saito, Mitsuru Kobayashi, Kenji Ezoe, Emiko Fukui, Midori Yoshizawa, Hiromichi Matsumoto
STUDY QUESTION: Can supplementation of medium with prolactin (PRL), epidermal growth factor (EGF) and 4-hydroxyestradiol (4-OH-E2) prior to embryo transfer improve implantation potential in mouse blastocysts derived from IVF? SUMMARY ANSWER: Combined treatment with PRL, EGF and 4-OH-E2 improves mouse blastocyst implantation rates, while alone, each factor is ineffective. WHAT IS KNOWN ALREADY: Blastocyst dormancy during delayed implantation caused by ovariectomy is maintained by continued progesterone treatment in mice, and estrogen injection rapidly activates blastocysts to implantation-induced status in vivo...
August 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28808197/effect-of-zeaxanthin-on-porcine-embryonic-development-during-in-vitro-maturation
#7
Seo-Jin Park, Kyoung-Ha So, Sang-Hwan Hyun
Zeaxanthin is a common carotenoid, which is a powerful antioxidant that protects against damage caused by reactive oxygen species. The aim of the present study was to investigate the effects of zeaxanthin supplementation on in vitro maturation of porcine embryo development. We investigated nuclear maturation, intracellular glutathione (GSH), and reactive oxygen species (ROS) levels during in vitro maturation, and subsequent embryonic development following parthenogenetic activation and in vitro fertilization (IVF)...
January 19, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28802704/early-miscarriage-rate-in-lean-polycystic-ovary-syndrome-women-after-euploid-embryo-transfer-a-matched-pair-study
#8
Lu Luo, Fang Gu, Huying Jie, Chenhui Ding, Qiang Zhao, Qiong Wang, Canquan Zhou
The early miscarriage rate is reported to be higher in patients with polycystic ovary syndrome (PCOS) compared with non-PCOS patients. However, whether PCOS is an independent risk factor for early miscarriage is still controversial; to what extent embryonic aneuploidy accounts for miscarriages of PCOS is still unknown. In this 1:3 matched-pair study, 67 lean PCOS patients and 201 controls matched for age, body mass index (BMI) and embryo scores undergoing a single euploid blastocyst transfer in vitrified-warmed cycles were analysed...
July 29, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28802113/l-carnitine-enhances-oocyte-maturation-and-improves-in%C3%A2-vitro-development-of-embryos-in-dromedary-camels-camelus-dromedaries
#9
Mohamed Fathi, K H El-Shahat
The aim of the present study was to investigate the effect of L-carnitine (LC) addition during either IVM or IVC on the developmental potential of camel oocytes. In Experiment 1; camel oocytes were matured in the absence (control) or presence of different concentrations of LC (0.25 mg, 0.5 mg, 0.75 mg and 1 mg/ml) for 30 h followed by in vitro fertilization and culture up to blastocyst stage. Our results demonstrated that oocytes treated with 0.5 mg/ml LC showed higher (P < 0.05) rates of maturation (74...
August 4, 2017: Theriogenology
https://www.readbyqxmd.com/read/28801637/effect-of-golph3-on-cumulus-granulosa-cell-apoptosis-and-icsi-pregnancy-outcomes
#10
Dianliang Lin, Jing Ran, Suqin Zhu, Song Quan, Baofeng Ye, Aili Yu, Yuefan Kang, Yuan Lin
Previous studies have shown that GOLPH3 mediates cell growth, proliferation and differentiation and inhibits cell apoptosis; however, the role of GOLPH3 in cumulus granulosa cells and the value of GOLPH3 in predicting ICSI pregnancy outcomes remain unknown until now. Our findings showed higher positive expression rate, score of staining intensity, and immunohistochemical score of GOLPH3 in the cumulus granulosa cells of the pregnant women relative to non-pregnant women, and a higher apoptotic rate of cumulus granulosa cells was detected in non-pregnant women than in pregnant women...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28800556/supplementation-of-lycopene-in-maturation-media-improves-bovine-embryo-quality-in%C3%A2-vitro
#11
M M R Chowdhury, Byung-Hyun Choi, Imran Khan, Kyeong-Lim Lee, Ayman Mesalam, Seok-Hwan Song, Lianguang Xu, Myeong-Don Joo, Fahmida Afrin, Il-Keun Kong
This study sought to modulate factors that reduce embryo quality in in vitro culture (IVC) systems. Over eight replicates, 3075 oocytes were cultured in in vitro maturation media containing various concentrations of lycopene, followed by in vitro fertilization and culture. The percentages of MII-stage oocytes, the presumptive zygotes that underwent cleavage and developed into blastocysts were significantly (P < 0.05) higher, the intracellular ROS concentrations reduced significantly (P < 0.05) in oocytes/blastocysts, TUNEL assay demonstrates reduced apoptosis and increased total cell number per blastocyst (P < 0...
August 3, 2017: Theriogenology
https://www.readbyqxmd.com/read/28799183/utilization-of-porcine-in%C3%A2-vitro-produced-parthenogenetic-embryos-for-co-transfer-with-vitrified-and-warmed-embryos
#12
Yoshiyuki Nakamura, Kazuhiro Kikuchi
The present study was conducted to evaluate the possibility of using in vitro-produced parthenogenetic (PA) embryos for co-transfer with morulae that had been collected in vivo and cryopreserved. The proportion of PA blastocysts (20.5%) was higher than that of their in vitro fertilization (IVF) counterparts (16.6%). Although there were no differences in morphology or diameter between the two groups, the number of cells in early PA blastocysts after in vitro culture for 6 days was lower than for IVF blastocysts (25...
August 10, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28797287/is-a-high-serum-copper-concentration-a-risk-factor-for-implantation-failure
#13
Hidehiko Matsubayashi, Kotaro Kitaya, Kohei Yamaguchi, Rie Nishiyama, Yukiko Takaya, Tomomoto Ishikawa
BACKGROUND: Copper-containing contraceptive devices may deposit copper ions in the endometrium, resulting in implantation failure. The deposition of copper ions in many organs has been reported in patients with untreated Wilson's disease. Since these patients sometimes exhibit subfertility and/or early pregnancy loss, copper ions were also considered to accumulate in the uterine endometrium. Wilson's disease patients treated with zinc successfully delivered babies because zinc interfered with the absorption of copper from the gastrointestinal tract...
August 10, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28795845/analysis-of-embryo-intactness-and-developmental-potential-following-slow-freezing-and-vitrification
#14
Lan Yu, Chanwei Jia, Yonglian Lan, Rui Song, Liying Zhou, Ying Li, Yu Liang, Shuyu Wang
The aim of this study was to identify the parameters that are related to intactness and developmental potential of a day 3 embryo after warming to improve the selection criteria used to cryopreserve and transfer embryos. We also sought to compare slow freezing and vitrification methods of cryopreservation and to evaluate the viability of non-intact embryos. Embryos warmed following slow freezing (n=220) or vitrification (n=522) were divided into 3 groups according to the proportion of surviving blastomeres (I<50%; II=50-99%; and III=100%)...
August 10, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/28795050/mixed-double-embryo-transfer-a-promising-approach-for-patients-with-repeated-implantation-failure
#15
Georgi Stamenov Stamenov, Dimitar Angelov Parvanov, Todor Angelov Chaushev
OBJECTIVE: The purpose of this study was to evaluate the efficacy of frozen mixed double-embryo transfer (MDET; the simultaneous transfer of day 3 and day 5 embryos) in comparison with frozen blastocyst double-embryo transfer (BDET; transfer of two day 5 blastocysts) in patients with repeated implantation failure (RIF). METHODS: A total of 104 women with RIF who underwent frozen MDET (n=48) or BDET (n=56) with excellent-quality embryos were included in this retrospective analysis...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28795048/evaluation-of-human-embryo-development-in-in-vitro-fertilization-and-intracytoplasmic-sperm-injection-fertilized-oocytes-a-time-lapse-study
#16
Hyung Jun Kim, Hye Jin Yoon, Jung Mi Jang, Won Don Lee, San Hyun Yoon, Jin Ho Lim
OBJECTIVE: We investigated whether the insemination method (in vitro fertilization [IVF] or intracytoplasmic sperm injection [ICSI]) affected morphokinetic events and abnormal cleavage events in embryonic development. METHODS: A total of 1,830 normal fertilized embryos were obtained from 272 IVF and ICSI cycles that underwent ovum retrieval culture using a time-lapse system (Embryoscope) from June 2013 to March 2015. All embryos were investigated by a detailed time-lapse analysis that measured the developmental events in the hours after IVF or ICSI insemination...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28795047/influence-of-the-insemination-method-on-the-outcomes-of-elective-blastocyst-culture
#17
Caizhu Wang, Guixue Feng, Bo Zhang, Jinhui Shu, Hong Zhou, Xianyou Gan, Ruoyun Lin
OBJECTIVE: The aim of this study was to explore the effects of the insemination method on the outcomes of elective blastocyst culture. METHODS: We retrospectively analyzed the outcomes of elective blastocyst culture performed between January 2011 and December 2014. RESULTS: There were 2,003 cycles of conventional in vitro fertilization (IVF) and 336 cycles of intracytoplasmic sperm injection (ICSI), including 25,652 and 4,164 embryos that underwent sequential blastocyst culture, respectively...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28795046/the-effects-of-different-types-of-media-on-in-vitro-maturation-outcomes-of-human-germinal-vesicle-oocytes-retrieved-in-intracytoplasmic-sperm-injection-cycles
#18
Farzaneh Fesahat, Razieh Dehghani Firouzabadi, Azita Faramarzi, Mohammad Ali Khalili
OBJECTIVE: Optimizing in vitro maturation (IVM) media to achieve better outcomes has been a matter of interest in recent years. The aim of this prospective clinical trial was to investigate the effects of different media on the IVM outcomes of immature oocytes at the germinal vesicle (GV) stage. METHODS: A total of 400 immature oocytes at the GV stage with normal morphology were retrieved from 320 infertile women aged 31±4.63 years during stimulated intracytoplasmic sperm injection (ICSI) cycles...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28794899/an-extended-model-for-culture-dependent-heterogenous-gene-expression-and-proliferation-dynamics-in-mouse-embryonic-stem-cells
#19
Simon Godwin, Daniel Ward, Elisa Pedone, Martin Homer, Alexander G Fletcher, Lucia Marucci
During development, pluripotency is a transient state describing a cell's ability to give rise to all three germ layers and germline. Recent studies have shown that, in vitro, pluripotency is highly dynamic: exogenous stimuli provided to cultures of mouse embryonic stem cells, isolated from pre-implantation blastocysts, significantly affect the spectrum of pluripotency. 2i/LIF, a recently defined serum-free medium, forces mouse embryonic stem cells into a ground-state of pluripotency, while serum/LIF cultures promote the co-existence of ground-like and primed-like mouse embryonic stem cell subpopulations...
2017: NPJ Systems Biology and Applications
https://www.readbyqxmd.com/read/28794478/a-method-based-on-artificial-intelligence-to-fully-automatize-the-evaluation-of-bovine-blastocyst-images
#20
José Celso Rocha, Felipe José Passalia, Felipe Delestro Matos, Maria Beatriz Takahashi, Diego de Souza Ciniciato, Marc Peter Maserati, Mayra Fernanda Alves, Tamie Guibu de Almeida, Bruna Lopes Cardoso, Andrea Cristina Basso, Marcelo Fábio Gouveia Nogueira
Morphological analysis is the standard method of assessing embryo quality; however, its inherent subjectivity tends to generate discrepancies among evaluators. Using genetic algorithms and artificial neural networks (ANNs), we developed a new method for embryo analysis that is more robust and reliable than standard methods. Bovine blastocysts produced in vitro were classified as grade 1 (excellent or good), 2 (fair), or 3 (poor) by three experienced embryologists according to the International Embryo Technology Society (IETS) standard...
August 9, 2017: Scientific Reports
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