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Oocytes in Medical News

Fertility experts present the latest research at reproductive medicine meeting

... with any measurable detrimental effects on the oocytes or resulting embryos. They found that Ovidrel ... induction and as a result, had similar mature oocytes harvested as age-matched controls. The ... and all patients successfully achieved embryos or oocytes for cryopreservation despite their illness and ...

New ovarian stimulation technique offers more cancer patients the chance to preserve their fertility

... days in the second group. A mean average of 13 oocytes were collected from the first group and 10 from the second group. Nearly 77% and 73% of the oocytes were mature in the respective groups, and after ... sperm injection (ICSI), 70% and 75% of the oocytes were fertilised respectively. The researchers ...

Pacific Fertility Center Announces Breakthrough in Egg Freezing Technology

... embryos created from vitrified and warmed donor oocytes (eggs), successfully delivered a baby in late ... to oocytes. "Even though we've been handling oocytes and embryos for many years, this technology ... the procedure, we began to freeze high quality oocytes from donors that had proven fertility. Using ...

Stem Cells Spur New Eggs in Ovaries of Adult Mice

... mammals, including humans, are born with a finite number of the eggs or oocytes needed to produce offspring. "These stem cells are continuous. They ... For years, scientists had believed that the capability to produce oocytes was lost in most mammalian species at birth. That line of thought was ...

Reduced ovarian reserve associated with increased risk of trisomic pregnancy

... may cause a decrease in ovarian reserve. However, a woman's ovarian reserve is most likely to be mainly determined by her genes: the number of oocytes a woman is born with and the rate of depletion of her oocyte pool is believed to be heritable. This is reflected in the similar ages at menopause of ...

Technique Preserves Future Fertility in Girls With Cancer

... at Hadassah Hebrew University Medical Center in Jerusalem, working with 19 patients ages 5 to 20, were able to retrieve an average of nine oocytes (immature eggs) per patient, and 34 percent of these eggs successfully matured. The researchers will next test the ability of these eggs to become ...

June 2008 highlights

... that reproductive markers were disrupted not only in the female offspring of these rats, but also in the grand offspring, which are derived from oocytes present in fetuses of the treated females. Changes in the second generation included blunting of preovulatory LH release, reduced progesterone ...

Study Spots Gene That Plays Role in Infertility

... where they are available for immediate release and, perhaps, fertilization. Menopause occurs when there are no more follicles and, therefore, no more oocytes left. The length of a woman's reproductive life is determined by the size of her follicle pool and the rate at which this pool is depleted. ...

Human embryonic stem cell lines created that avoid immune rejection

... Cell and colleagues at the company and from the Russian Academy of Medical Sciences, described the successful parthenogenetic activation of human oocytes and the subsequent derivation of cell lines having the morphology and markers characteristic of human embryonic stem cells. In a paper entitled, HLA ...

MUHC in the spotlight at the 14th World Congress on In Vitro Fertilization

... preserving surgical strategies in ovarian, endometrial and cervical cancer Rio-Cheng Chian - Wednesday 19.09.2007 at 10:30am Vitrification of oocytes Male infertility : - Peter Chan - Monday 17.09.2007 at 2:00 pm Impact of chemotherapy on the reproductive health of men - Bernard ...

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Oocytes in Medical Technology

Study Reports Successful Cloning of Human Embryo Using Adult DNA

... the cloning of a human embryo using donated oocytes (egg cells) and DNA from the cells of an adult ... Subsequently, several of the reconstructed oocytes continued to develop as normal embryos, to the ... results, including the use of freshly donated oocytes from successful egg donors. While the study is ...

CRi Oosight(TM) Instrument Crucial in IVF Breakthrough Demonstrating a Correlation Between Non-Invasive Egg Metrics and Pregnancy

... and zona. In this study, spindle density was significantly higher in those oocytes resulting in pregnancy. The work by Dr. Kilani's group, "Are there non-invasive markers in human oocytes that can predict pregnancy outcome?" was published in March by ...

Molecular Biometrics Hires Denny Sakkas, PhD Renowned Yale Embryologist and International Thought-Leader, as Chief Scientific Officer; Opening U.S. Research Facility

... lead product candidates are diagnostic tests used to evaluate embryos, oocytes and sperm viability for in vitro fertilization (IVF). Molecular ... in the areas of infertility (to determine viability of embryos, sperm and oocytes used in IVF), maternal fetal medicine (to monitor the health status of a ...

Cloned Human Embryos Successfully Reprogrammed Using Human - But Not Animal - Eggs

... Mass., Feb. 2 /PRNewswire-FirstCall/ -- Advanced Cell Technology, Inc. (OTC Pink Sheets: ACTC) and its collaborators reported today that human oocytes (or 'eggs') have the capacity to extensively reprogram adult human cells. The research, which appears online ahead of print in the journal Cloning ...

Schering-Plough Announces Phase III Data for Sustained Follicle Stimulant

... cycle) was similar to that achieved in patients receiving 200 IU recombinant FSH (follitropin beta) (38.1 percent per started cycle). The number of oocytes retrieved (co-primary endpoint) was within the limits of clinical equivalence, and the estimated difference of +1.2 was in favor of the ...

Embryo Viability Studies Support Utility of Novel, Metabolomic Profiling Technology

... this week at the 24th annual Meeting of the European Society for Human Reproduction and Embryology (ESHRE), include perspectives in evaluating oocytes (eggs), embryos and blastocysts (late stage embryos) to determine embryo viability using the company's novel, proprietary technology. "As embryos ...

Ferring Reports on ENDOMETRIN Presentations at Pacific Coast Reproductive Society Annual Meeting

... <0.001 BMI 25.0 24.9 0.181 Duration 10.0 10.6 oocytes 14.0 13.4 0.225 Continuing Pregnancy (%) 41.3 40.6 ...
Oocytes in Medical Products

IX51 Inverted System Microscope

Features:... illumination pillar and has a 45mm working distance and 0.5NA to provide excellent 3-D relief images of specimens in plastic vessels, especially oocytes during microinjection observations ...
Company:Olympus America Scientific
Oocytes in Biological News

Universitat Autonoma de Barcelona researchers first to clone mice in Spain

... order to clone the animals, researchers collected oocytes and surrounding cumulus cells from several female ... The chromosomes were extracted from each of the oocytes and substituted with a cell from the cumulus by cytoplasm injection. Once the oocytes had been reconstructed, they were activated by ...

Animal eggs not suitable substitutes to produce stem cells

... Mary Ann Liebert, Inc., demonstrates that animal oocytes lack the capacity to fully reprogram adult human ... compared the reprogramming of human cells using oocytes obtained from cows, rabbits, and humans. They ... The ability to reprogram human cells using oocytes would enable the production of patient-specific ...

December 2008 highlights from Biology of Reproduction

... ovarian development establishes the population of oocytes and follicles and instigates evelopment of a ... fail to form, the result is oocyte demise, yet oocytes are also essential for follicular development. ... appear to form in Sohlh2 -null ovaries, the oocytes are rapidly lost and follicles do not develop to ...

Stowers Institute's Hawley Lab identifies factors responsible for restart of meiotic cycle

... work in concert to restart the meiotic cycle of oocytes following a natural period of dormancy. The ... of female meiosis. The cells that will become oocytes in human females develop during fetal development ... actual process of meiosis before birth, but the oocytes remain in a suspended state until the female ...

Ovarian transplantation: New technique gives greatly improved results in this delicate operation

... with fluorescent microscopy to determine the loss or preservation of oocytes in fresh and frozen ovarian tissue of 15 young women undergoing cancer ... by classical slow freezing methods. "We found that 91.9% of the fresh oocytes were viable compared with 88.9% of those vitrified. However, slow freezing ...

A unique arrangement for egg cell division

... spindles are found in all dividing cells. What is special about oocytes is that they lack specialised spindle-forming organelles, called ... outside of the egg. For a long time we did not understand how mammalian oocytes could assemble a bipolar spindle without such centrosomes. Tracking ...

Stem cell research: From molecular physiology to therapeutic applications

... reliably used to fulfill the promise of stem cell therapy in regenerative medicine. Dr. Lin Liu's group found that pES cells generated from immature oocytes in mice exhibit pluripotency resembling fES cells, as evidenced by similarly high chimera production and germline transmission. Thus, immature eggs ...

Ovarian transplantation: First baby is born after a new technique

... of eggs we could, and carry out an IVF procedure on this patient. "Six months after the operation, we transferred two blastocysts. A total of 22 oocytes were retrieved and produced 16 embryos, which in turn produced seven blastocysts. Unfortunately the first time round this patient developed an ...

Who goes abroad for fertility treatment and why?

... looked in more detail at the situation in his own country. 16 out of the 18 Belgian reproductive medicine centres which were licensed to handle oocytes and create embryos were surveyed on the nationality of foreign patients coming for treatment between 2000 and 2007, as well as on the type of ...

ESHRE launches international study of polar body screening

... data at ESHRE 2010 in Rome and to start the RCT with the involvement of at least six centres in different European countries later the same year. oocytes to be used in the pilot phase will be obtained from volunteer patients who have given consent for their use in this study. There will be no age ...

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Oocytes in Biological Technology

Schering-Plough Announces Phase II and III Data for Corifollitropin Alfa

... alfa resulted in significantly more oocytes and an equally short duration of treatment as ... or more after embryo transfer. The number of oocytes retrieved was the co-primary endpoint. The ... 50.6% The mean number of oocytes retrieved per attempt was 13.7 (+/-8.2) for the ...

Animal Eggs Not Suitable Substitutes to Produce Stem Cells

... Mary Ann Liebert, Inc., demonstrates that animal oocytes lack the capacity to fully reprogram adult human ... , compared the reprogramming of human cells using oocytes obtained from cows, rabbits, and humans. They ... The ability to reprogram human cells using oocytes would enable the production of patient-specific ...

EMD Serono Launches Landmark Patient Registry for Egg Freezing

... a three year period. Women participating in the Registry will have their oocytes frozen, thawed and the resulting fertilized embryos transferred. It is ... investigators across the country who are freezing and later thawing oocytes for embryo production. Local ethics committee or Institutional Review ...

Unisense FertiliTech A/S Receives CE Mark of Approval for EmbryoScope(TM) Embryo Monitoring System

... with the goal of improving embryo assessment and to facilitate the goal of elective single embryo transfer." During IVF treatment, multiple oocytes are removed from the patient and fertilized in-vitro. The resulting fertilized eggs are cultured for a period of 2 to 5 days, before the embryologist ...

Stemagen First to Create Cloned Human Embryos From Adult Cells

... were successfully created from approximately 10% of all mature donated oocytes, an unexpectedly high rate given past research in this field. The oocytes used in this study were donated, without compensation, by egg donors and intended parents undergoing egg donation cycles for reproductive purposes at ...

Intracytoplasmic Spermatocyte Injection (ICSI)

... the joystick button. If several oocytes are obtained, only 34 oocytes are injected as a rule. They are then ... F-10-medium [5] and the remaining oocytes are then injected. Further methods of procedure ...

Transgenic Animals

... or other small mammals are used to introduce foreign DNA into oocytes or embryos (blastocysts). ... it is closer to the oocyte surface. These oocytes are subsequently transferred into the uterus of pseudopregnant ...

Your Data: Detection of Oocyte-specific Gene Expression Using Ambion's Cells-to-cDNA Kit

... protocol, Dr. Bortvin was able to easily detect both his gene-specific transcript and the GAPDH housekeeping mRNA from single oocytes using the Cells-to-cDNA Kit protocol. Figure 1. Gene-specific RT-PCR on a Single Mouse Oocyte Using ...
Oocytes in Biological Definition

Meiosis

... evidence of crossing over) can be seen. In the human ovary , oocytes are stored in the diplotene stage since fetal life. Only just prior to ... the time of ovulation (meiosis II ends only just after fertilization ). oocytes that are not ovulated do not complete meiosis I. The end of Prophase I ...

Cell growth

... adhesion between myocytes and some are involved in adhesion-dependent cell-to-cell signaling that allows for a cascade of cell fusion events. oocytes can be unusually large cells in species for which embryonic development takes place away from the mother's body. Their large size can be achieved ...

Ploidy

... can vary within an organism. In humans, most cells are diploid (containing one set of chromosomes from each parent), though sex cells ( sperm and oocytes ) are haploid. In contrast, tetraploidy (four sets of chromosomes), a type of polyploidy , is not uncommon in healthy plant species. Euploidy , ...

Ploidy

... can vary within an organism. In humans, most cells are diploid (containing one set of chromosomes from each parent), though sex cells ( sperm and oocytes ) are haploid. In contrast, tetraploidy (four sets of chromosomes), a type of polyploidy , is not uncommon in healthy plant species. Euploidy , ...
Oocytes in Biological Dictionary

Oocytes

... oocyte is part of the ovary development. ... oocytes are rich in cytoplasm which contains yolk ... develops by meiosis; a female gametocyte. ... oocytes are rich in cytoplasm which contains yolk ... remove the follicle cells which surround the oocytes . ... Properly de-folliculated ...

Zona pellucida

... Sperm– zona pellucida binding and penetration were assessed on the oocytes that ... In conclusion, defective sperm– zona pellucida interaction ... ... Human zona pellucida were mechanically isolated by disrupting oocytes or embryos ... Whether the zona pellucida originates from the ...

Xenopus

... 42(4):476-507. de Sá, R. O. ... Microinjection of Xenopus laevis oocytes followed by thin-sectioning electron ... Part 3: Dissection of Xenopus oocytes. The next day, wash the oocytes 3 times ... Compare Cheap Prices for Xenopus at NexTag.com. Find ...

Microfilament

... underwent GV ... Microtubule and microfilament dynamics in porcine oocytes during meiotic maturation. ... ... examines the effects of actin ... Factors ... microfilament -mediated process. ... does not occur in oocytes pretreated with microfilament ... membrane and directing microfilament ...

Follicles

... 3 Development of oocytes in ovarian follicles . 4 Pathology. 5 References. 6 Additional images ... ovary containing a maturing ovum surrounded by its encasing ... of oocytes in ovarian follicles . 4 Pathology. 5 References ... Get details on ...

Diplotene

... follicular formation. ... diplotene ) and an increase in the number of oocytes expressing MSY2 (a ... However, errors at the diplotene stage are substantially increased, suggesting ... At diplotene , all oocytes studied had a desynapsing bivalent 13 (recorded as a ... diplotene ...

Zygotene

... of ENs associated with SCs and AEs during zygotene for six plant species ... At the zygotene , pachytene and diplotene stages, oocytes with fragmented axial ... The durations of the leptotene, zygotene and pachytene stages in mice were ... The staining became brighter through ...

Spermatids

... resolved when plastic sections are viewed ... ... Injection: Couples who go through spermatid injection should be counseled for potential ... oocytes by injecting spermatozoa, spermatids and spermatocytes. ... ... genes encode proteins located in human late spermatids and in sperm ...

Spermatid

... containing membrane ... A round spermatid was drawn into the injection pipette (Figure 2 b-1) ... Pronucleus formation in cynomolgus monkey oocytes post-round spermatid injection (ROSI) ... Since fertilization by round spermatid nucleus was first reported (Ogura and ... Round ...

SnRNA

... U snRNA assemble into the export complex. ... Arrows indicate the nucleotide changes in Xenopus U2 snRNA . ... Lanes 2 and 5 are U2-depleted oocytes supplemented with synthetic U2 snRNA . ... Cell death and differentiation is a monthly research journal focused on the ... The observations ...

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