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https://www.readbyqxmd.com/read/28531193/raman-microscopy-investigation-of-vitrification-induced-structural-damages-in-mature-bovine-oocytes
#1
Giulia Rusciano, Carolina De Canditiis, Gianluigi Zito, Marcello Rubessa, Maria Serena Roca, Rosa Carotenuto, Antonio Sasso, Bianca Gasparrini
Although oocyte cryopreservation has great potentials in the field of reproductive technologies, it still is an open challenge in the majority of domestic animals and little is known on the biochemical transformation induced by this process in the different cellular compartments. Raman micro-spectroscopy allows the non-invasive evaluation of the molecular composition of cells, based on the inelastic scattering of laser photons by vibrating molecules. The aim of this work was to assess the biochemical modifications of both the zona pellucida and cytoplasm of vitrified/warmed in vitro matured bovine oocytes at different post-warming times...
2017: PloS One
https://www.readbyqxmd.com/read/28512855/insulin-like-growth-factor-i-enhances-the-developmental-competence-of-yak-embryos-by-modulating-aquaporin-3
#2
P Chen, Y Pan, Y Cui, Z Wen, P Liu, H He, Q Li, X Peng, T Zhao, S Yu
The objective of our present study was to determine the effects of insulin-like growth factor I (IGF-I) on the development of yak (Bos grunniens) embryos after cumulus-oocyte complex (COC) vitrification and warming followed by in vitro fertilization (IVF). In Experiment 1, the yak COCs underwent vitrification and then IVF. Embryos were incubated in synthetic oviductal fluid (SOF) supplemented with four concentrations (0, 50, 100 and 200 ng/ml) of IGF-I, while the yak COCs without vitrification or IGF-I supplementation acted as the control group; the BAX, BCL-2, AQP3mRNA and aquaporin 3 (AQP3) protein expression levels in the five groups of blastocysts were evaluated using quantitative real-time PCR and immunofluorescence analyses...
May 16, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28500451/pregnancy-rates-for-single-embryo-transfer-set-of-day-5-and-day-6-blastocysts-after-cryopreservation-by-vitrification-and-slow-freeze
#3
Leah Kaye, Erica Anspach Will, Alison Bartolucci, John Nulsen, Claudio Benadiva, Lawrence Engmann
PURPOSE: The purpose of this study was to compare clinical and ongoing pregnancy rates in cycles with single embryo transfer (SET) of blastocysts cryopreserved on day 5 or day 6. Our aim was to determine whether day 6 blastocysts perform adequately to recommend SET. METHODS: Retrospective cohort study including 468 transfer cycles for 392 women younger than age 38 undergoing SET at a university-affiliated IVF clinic in the USA. A total of 261 day 5 blastocysts and 207 day 6 blastocysts for frozen-thawed SET between 2010 and 2016 were analyzed...
May 12, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28460662/downsizing-cumulus-cell-layers-to-improve-cryotolerance-of-germinal-vesicle-stage-bovine-oocytes
#4
Kazuya Tashima, Yuki Kubo, Masumi Hirabayashi, Shinichi Hochi
This study was undertaken to investigate whether complete removal or downsizing of the cumulus cell layers in germinal vesicle (GV)-stage bovine cumulus-oocyte complexes (COCs) can improve blastocyst development rate following Cryotop vitrification. Downsized COCs (196 μm in mean diameter) and denuded oocytes (141 μm in mean diameter) were prepared by vortex-mixing of full-sized COCs (330 μm in mean diameter) retrieved from abattoir-derived ovaries. Nuclear maturation rates, assessed by the first polar body extrusion, after vitrification and the subsequent 22-h IVM were comparable (61...
June 2017: Theriogenology
https://www.readbyqxmd.com/read/28458301/ultrastructural-characteristics-of-human-oocytes-vitrified-before-and-after-in-vitro-maturation
#5
Yolanda Segovia, Noemí Victory, Irene Peinado, Laura M García-Valverde, Magdalena García, Jon Aizpurua, Ana Monzó, María José Gómez-Torres
The development of an effective program that combines in vitro maturation (IVM) and cryopreservation for immature oocytes would represent a novel advance for in vitro fertilization (IVF), especially as a means to preserve the fertility of women in unique situations. The aim of this study was to analyze the ultrastructural characteristics of human oocytes, obtained after controlled ovarian stimulation, to determine whether IVM is best performed before or after vitrification. To this end, we analyzed the following features in a total of 22 MII oocytes: size, zona pellucida and perivitelline space, mitochondria number, M-SER (mitochondria-smooth endoplasmic reticulum) aggregates and M-V (mitochondria-vesicle) complexes, the number of cortical granules and microvilli, and the presence of vacuolization using transmission electron microscopy (TEM)...
April 30, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28433371/in%C3%A2-vitro-fertilization-with-preimplantation-genetic-diagnosis-for-aneuploidies-in-advanced-maternal-age-a-randomized-controlled-study
#6
Carmen Rubio, José Bellver, Lorena Rodrigo, Gema Castillón, Alfredo Guillén, Carmina Vidal, Juan Giles, Marcos Ferrando, Sergio Cabanillas, José Remohí, Antonio Pellicer, Carlos Simón
OBJECTIVE: To determine the clinical value of preimplantation genetic diagnosis for aneuploidy screening (PGD-A) in women of advanced maternal age (AMA; between 38 and 41 years). DESIGN: This was a multicenter, randomized trial with two arms: a PGD-A group with blastocyst transfer, and a control group with blastocyst transfer without PGD-A. SETTING: Private reproductive centers. PATIENT(S): A total of 326 recruited patients fit the inclusion criteria, and 205 completed the study (100 in the PGD-A group and 105 in the control group)...
April 19, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28421505/appendix-a-cryotech-%C3%A2-vitrification-thawing
#7
Goral Gandhi, Masashige Kuwayama, Sakina Kagalwala, Priyanka Pangerkar
In the last 15-20 years, many centers are using vitrification as a method of choice for cryopreservation of human oocytes and embryos. As vitrification technologies have improved their success profiles, new applications seem to have emerged, making IVF treatments more successful and more flexible.This appendix describes the Cryotech(®) method, which is the latest "minimal volume approach" method, suitable for cryopreservation of oocytes and embryos of any developmental stage, including blastocysts. Dr. Masashige Kuwayama, who has introduced major advances in oocyte and embryo cryopreservation, has developed this method...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28421495/chapter-11-human-embryo-vitrification
#8
Juergen Liebermann
Cryopreservation is one of the keystones in clinical infertility treatment. In particular vitrification has become a well-established and widely used routine procedure that has allowed important expansion of therapeutic strategies when IVF is used to treat infertility. Vitrification of human blastocysts allows us to maximize the potential for conception from any single in vitro fertilization cycle and prevents wastage of embryos. The technology may even be used to eliminate fresh embryo transfers for reasons of convenience, uterine receptivity, fertility preservation, preimplantation genetic diagnosis, or emergency management...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28421490/chapter-6-technology-of-aseptic-cryoprotectant-free-vitrification-of-human-icsi-spermatozoa
#9
Vladimir Isachenko, Raul Sanchez, Peter Mallmann, Gohar Rahimi, Evgenia Isachenko
The aim of this chapter was to describe the standardized aseptic technology of permeable cryoprotectant-free vitrification of human spermatozoa in capillaries (for ICSI or IVF in microvolume). Spermatozoa, vitrified by this technology, are free from seminal plasma owing to swim-up procedure preceding vitrification and are free from permeable cryoprotectants. They are ready for further use immediately after warming without any additional treatment.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28396487/culture-time-of-vitrified-warmed-zygotes-before-microinjection-affects-the-production-efficiency-of-crispr-cas9-mediated-knock-in-mice
#10
Yoshiko Nakagawa, Tetsushi Sakuma, Norihisa Nishimichi, Yasuyuki Yokosaki, Toru Takeo, Naomi Nakagata, Takashi Yamamoto
Robust reproductive engineering techniques are required for the efficient and rapid production of genetically modified mice. We have reported the efficient production of genome-edited mice using reproductive engineering techniques, such as ultra-superovulation, in vitro fertilization (IVF) and vitrification/warming of zygotes. We usually use vitrified/warmed fertilized oocytes created by IVF for microinjection because of work efficiency and flexible scheduling. Here, we investigated whether the culture time of zygotes before microinjection influences the efficiency of producing knock-in mice...
May 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28381082/embryo-transfer-a-review-of-timing-and-techniques
#11
Pietro Bortoletto, Jennifer Bakkensen, Raymond M Anchan
Since the first successful human in vitro fertilization (IVF) pregnancy nearly 40 years ago, remarkable progress has been made in assisted reproductive technology (ART). Improvements in oocyte retrieval, embryo culture, genetic screening, and embryo selection have contributed to dramatic improvements in IVF outcomes. A more robust understanding of embryologic development has driven innovation in not only the timing of embryo transfer but also the number of embryos to transfer. Additionally, overcoming the technical hurdle of embryo vitrification has given both physicians and patients several benefits including the flexibility to mitigate effects of superovulation on the endometrium, limit the number of embryos transferred, afforded an opportunity to screen the quality of embryos both by evaluating in vitro development as well as preimplantation genetic testing...
April 4, 2017: Minerva Endocrinologica
https://www.readbyqxmd.com/read/28349510/fresh-versus-frozen-embryo-transfers-in-assisted-reproduction
#12
REVIEW
Kai Mee Wong, Madelon van Wely, Femke Mol, Sjoerd Repping, Sebastiaan Mastenbroek
BACKGROUND: In general, in vitro fertilisation (IVF) or intracytoplasmic sperm injection (ICSI) implies a single fresh and one or more frozen-thawed embryo transfers. Alternatively, the 'freeze-all' strategy implies transfer of frozen-thawed embryos only, with no fresh embryo transfers. In practice, both strategies can vary technically including differences in freezing techniques and timing of transfer of cryopreservation, that is vitrification versus slow freezing, freezing of two pro-nucleate (2pn) versus cleavage-stage embryos versus blastocysts, and transfer of cleavage-stage embryos versus blastocysts...
March 28, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28302936/cryotolerance-of-porcine-blastocysts-is-improved-by-treating-in-vitro-matured-oocytes-with-l-carnitine-prior-to-fertilization
#13
Jenna L Lowe, Louise K Bartolac, Roslyn Bathgate, Christopher G Grupen
Sufficient generation of adenosine triphosphate (ATP) by oocytes is critical for fertilization and embryo development. The objective of this study was to determine the effects of supplementing media with L-carnitine, a co-factor required for the metabolism of fatty acids, during the peri-fertilization period on embryo development and energy generation. Firstly, in vitro fertilization (IVM) porcine oocytes were co-incubated with sperm in IVF medium supplemented with 0‒24 mM L-carnitine. The blastocyst formation rate of the control group was greater than those of the L-carnitine groups (P < 0...
March 16, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28292612/perinatal-outcomes-in-children-born-after-fresh-or-frozen-embryo-transfer-a-catalan-cohort-study-based-on-14-262-newborns
#14
Mar Vidal, Kilian Vellvé, Mireia González-Comadran, Ana Robles, Maria Prat, Mar Torné, Ramón Carreras, Miguel A Checa
OBJECTIVE: To ascertain whether perinatal outcomes are affected by vitrification and/or controlled ovarian hyperstimulation (COH). DESIGN: Register-based cohort study. SETTING: Not applicable. PATIENT(S): Women undergoing in vitro fertilization (IVF) between 2008 and 2012 using autologous or donated eggs who had a singleton pregnancy delivered from the 24th week onward. INTERVENTION(S): Fresh embryo transfer (ET) or frozen-thawed ET in women undergoing IVF...
April 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28228962/conforming-with-current-regulation-in-turkey-regarding-the-freezing-of-oocytes-a-case-report-of-the-first-pregnancy-in-turkey-achieved-through-oocyte-vitrification
#15
Semra Kahraman, Kahraman Ulker, Caroline Pirkevi Çetinkaya, Yesim Kumtepe Colakoglu, Hakan K Yelke, Cihangir Yilanlioglu
OBJECTIVES: To present the first pregnancy achieved in Turkey with frozen-warmed oocytes in a case with previous nine unsuccessful assisted reproductive technology (ART) attempts. METHODS: The clinical follow-up of a 33-year-old female applying to our ART centre after a long and complicated history of infertility is described. RESULTS: In April 2013, the woman attempted our centre for her 10th ART trial. She informed us on oocyte pick-up (OPU) day that her husband had been hospitalized following a car crush in Albania and was unable to travel to our clinic to give a sperm sample...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28210478/the-twin-epidemic-in-infertility-care-why-do-we-persist-in-transferring-too-many-embryos
#16
EDITORIAL
W Ombelet
The epidemic of iatrogenic multiple births as a result of infertility treatment are responsible for an unacceptable high incidence of maternal, perinatal and childhood morbidity and mortality. Healthcare costs due to infertility therapy are too high and this may lead to social and political concern. The introduction of single embryo transfer (SET) was a real breakthrough, but was only accepted in most European countries and Japan. The United States, Latin America and most developing countries still have high multiple pregnancy rates...
December 2016: Facts, Views & Vision in ObGyn
https://www.readbyqxmd.com/read/28160207/impact-of-prolonged-oocyte-incubation-time-before-vitrification-on-oocyte-survival-embryo-formation-and-embryo-quality-in-mice
#17
Azade Karami, Mitra Bakhtiari, Mehri Azadbakht, Rostam Ghorbani, Mozafar Khazaei, Mansour Rezaei
Oocyte incubation time before freezing is one of the factors affecting oocyte vitrification. In the assisted reproductive technology (ART) clinics, it is sometimes decided to perform oocyte vitrification after a long period of incubation time due to various conditions, such as inability to collect semen samples, unsuccessful urological interventions (PESA, TESE, etc.), or unexpected conditions. A time factor of up to 6 h has been studied in the available reports. Therefore, this study was designed to evaluate oocyte incubation time before freezing at 0, 6, 12, 18, and 24 h after retrieval...
February 3, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28147214/microtubule-stabilisers-docetaxel-and-paclitaxel-reduce-spindle-damage-and-maintain-the-developmental-competence-of-in-vitro-mature-bovine-oocytes-during-vitrification
#18
Jakkhaphan Pitchayapipatkul, Tamás Somfai, Satoko Matoba, Rangsan Parnpai, Takashi Nagai, Masaya Geshi, Thevin Vongpralub
This study compared the efficacy of docetaxel (DT) and paclitaxel (PT) in reducing spindle damage during vitrification and maintaining the developmental competence of in vitro-matured (IVM) bovine oocytes after vitrification and warming. Pretreatment of IVM oocytes with 0.05µM DT for 30min before vitrification resulted in significantly higher (P<0.05) rates of oocyte survival and cleavage after IVF, as well as subsequent blastocyst rates on Days 7-9 and hatching on Days 8-9, compared with oocytes pretreated with 1...
February 2, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28093199/effect-of-different-cryo-devices-on-in%C3%A2-vitro-maturation-and-development-of-vitrified-warmed-immature-buffalo-oocytes
#19
Yelisetti Uma Mahesh, Henderson Rose Winnie Gibence, Sisinthy Shivaji, Brahmasani Sambasiva Rao
The aim of the study was to identify a cryo-device that would be best suited for the vitrification of buffalo immature cumulus-oocyte complexes (COCs) as judged by viability and meiotic competence of the vitrified-warmed oocytes and their development ability following in vitro fertilization (IVF). The expression of oocyte secreting factors and their receptors (GDF9, BMP15, BMPR2, TGFBR1) and apoptosis related genes (BCL2, BAX, P53, C-MYC) were compared in vitrified-warmed oocytes after in vitro maturation...
April 2017: Cryobiology
https://www.readbyqxmd.com/read/28069092/reduced-competence-of-immature-and-mature-oocytes-vitrified-by-cryotop-method-assessment-by-in-vitro-fertilization-and-parthenogenetic-activation-in-a-bovine-model
#20
Daiane L Bulgarelli, Alessandra A Vireque, Caroline P Pitangui-Molina, Marcos F Silva-de-Sá, Ana Carolina J de Sá Rosa-E-Silva
This study aimed to evaluate the embryo development competence, the nuclear maturation and the viability of germinal vesicle (GV) and metaphase II (MII) oocytes vitrified by the Cryotop method. Cumulus-oocyte complexes were derived from bovine ovaries and three experiments were conducted. In Experiment 1, GV oocytes were vitrified and underwent in vitro maturation (IVM) or not and their nuclear maturation was assessed by orcein staining. In Experiment 2, GV oocytes and MII oocytes were vitrified or not and the viability was assessed by calcein/ethidium homodimer-1 staining...
April 2017: Zygote: the Biology of Gametes and Early Embryos
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