Articles tagged with Embryos
Researchers have developed artificial pseudo-embryos from mouse stem cells that display characteristics of early embryonic development, including the formation of antero-posterior, dorso-ventral, and medio-lateral axes. These structures, called gastruloids, could complement animal embryos in studying mammalian embryonic development.
A study of almost 83,000 IVF patients found that women who produce 15 or more eggs benefit from frozen embryo transfers, while those producing fewer eggs see better results with fresh transfers. This challenges the long-held 'freeze-all' approach.
Recent research reveals that lipid droplets regulate proteins involved in gene expression, regulating their maturation, breakdown, and storage. This understanding has significant implications for embryonic development and the study of obesity and lipodystrophies.
Experts believe extending the current 14-day limit would allow scientists to study embryonic development and improve IVF procedures. This could also enable research into 'organoids' - miniature human organs created in labs.
The largest randomized trial on genetic screening before embryo transfer found no difference in live birth rates between groups with and without the procedure. However, there was a lower miscarriage rate and fewer embryo transfers in the group that received genetic screening.
Scientists have discovered how epigenetic marks behave in the first few days after conception, shedding light on their role in shaping later health. The study found that these marks are sensitive to external environmental factors and may be linked to adverse health outcomes in later life.
Since the world's first test-tube baby was born in 1978, over 8 million babies have been conceived through IVF, with a record 157,449 babies born in Europe in 2015. European pregnancy rates for IVF and ICSI have stabilized at around 36%, while egg donation treatments have seen significant rises, with pregnancy rates now at about 50%.
Researchers found that even extremely low doses of an endocrine disruptor caused epigenetic changes in a pregnant sow's DNA and its offspring. The study suggests that humans may also be affected by such chemicals, leading to a re-assessment of acceptable daily intake values.
A study by the University of Helsinki found that IVF can alter embryonic growth, particularly in relation to genetic variation. Children born from frozen embryo transfer had significantly higher birth weights than those born from fresh embryo transfer.
Researchers from CNRS and INSERM identify 'primitive mast cells' generated in yolk sac during embryonic development. These cells play a crucial role in shaping the body's immune response, contradicting previous theories on mast cell origin.
A team of Rockefeller scientists has discovered the molecular signals that direct cell differentiation in human embryos, shedding light on the earliest stages of development. The findings have implications for regenerative medicine and could lead to new treatments for diseases such as cancer and diabetes.
Researchers have discovered a precise DNA sequence code that determines how transcription factors bind to specific regions in the genome. This finding sheds light on cell differentiation during embryonic development, offering potential insights into diseases caused by disrupted transcription factor function.
A study by Tokyo University of Agriculture and Technology reveals that live-cell imaging can detect chromosomal abnormalities in bovine IVF embryos, increasing pregnancy success rates. The technique identifies half of morphologically transferable embryos as having nuclear/chromosomal abnormalities, which may lead to abortion.
Researchers at UNLV have found that frog embryos can regenerate their entire eye within 3 to 5 days after injury, contradicting previous claims. This breakthrough has potential implications for human tissue regeneration and may lead to the development of new treatments for eye injuries.
A 180 million-year-old pregnant ichthyosaur has been discovered in Yorkshire, featuring six to eight tiny embryos. This find is significant as it is the first time a reptilian embryo has been found in Yorkshire and the youngest of British embryo-bearing specimens.
Researchers from Brown University and Harvard Law School urge the US to allow mitochondrial replacement therapy to prevent fatal mitochondrial diseases in children. The procedure replaces mutation-bearing mitochondria with donated mutation-free ones, saving lives and alleviating human suffering.
The Laramie Foothills Bison Conservation Herd has welcomed its first IVF-calved female, conceived using eggs and sperm from Yellowstone genetics. The breakthrough could provide a solution for conserving endangered species like the Northern white rhinoceros.
Researchers found that e-cigarette aerosol exposure causes shape changes and narrowing of the orofacial area in developing murine embryos. Flavored e-cigAMs showed greater detrimental effects than plain e-cigAMs, highlighting a potential risk to fetal development.
A new study reveals that 68% of genetic mutations causing fetal death affect the placenta, highlighting its critical role in development. Placental defects often occur alongside brain, heart, and circulation issues.
Tufts University biologists computationally model and manipulate electrical patterns in developing frog embryos to prevent nicotine-induced defects. They identify a hyperpolarization-activated channel that restores normal bioelectric patterns, rescuing embryos from brain defects.
Research at EMBL shows that synchronization between Wnt and Notch pathways enables embryo segmentation. Changing their relative timing prevents segment formation.
A study published in the New England Journal of Medicine found that women using IVF have similar chances of having a baby with fresh or frozen embryos. The research, involving 2,157 women, showed no significant difference in live birth rates between the two groups.
A recent study published in The New England Journal of Medicine has found that frozen embryos can lead to the same number of live births as fresh embryos in IVF. Researchers investigated 800 infertile women and found equivalent pregnancy and live birth rates between frozen and fresh embryo groups.
A recent study published in eLife found that a maternally inherited gene is essential for proper zebrafish embryonic development, and its absence leads to fatal defects. The research reveals the critical role of this gene in regulating cell signaling pathways, including Nodal signaling, which plays a key role in left-right patterning.
Scientists found that these gel-based containers can retain liquid nitrogen temperatures below -150°C for up to 10 hours, preserving embryo viability. The reusable and DIY-friendly materials also show promise for efficient transportation of sperm and embryos.
Researchers have found hundreds of well-preserved pterosaur eggs, including 16 with embryonic remains, providing insights into their development and reproductive strategy. The study suggests that these flying reptiles may have needed parental care and engaged in colonial breeding.
Researchers at Osaka University have found a key gene responsible for the development of male and female traits in an ancient crustacean. The study reveals how this gene, doublesex1, is expressed differently in males and females, leading to distinct sex-specific characteristics.
A national study by CU & Duke finds that transferring one embryo during IVF doubles the chance of a healthy baby. Fresh donor eggs provide a higher chance of implantation compared to frozen eggs.
Alicia Timme-Laragy's research investigates the health effects of PFOS and its replacement chemical PFBS on embryos of fish, worms, and fruit flies. The study aims to understand how these pollutants affect nutrient deposition and later-life metabolic dysfunction.
Researchers found a strong correlation between poor paternal diet and poor offspring survivorship in male fruit flies. The study suggests that the father's diet can play a significant role in shaping the health of their babies through epigenetic mechanisms.
Researchers at the University of Pittsburgh are studying the mechanics of morphogenesis in frog embryos to better understand human development, birth defects, and cancer. By applying structural analysis principles, they aim to develop a tool that provides bioengineers with greater control over tissue self-assembly.
Scientists have achieved a breakthrough in dry preservation of mammalian sperm cells, allowing for the possibility of preserving feline reproductive cells and expanding conservation efforts. The new method uses rapid microwave dehydration, enabling minimal DNA damage and viability.
Researchers found mangrove rivulus fish recognize single embryos as related to themselves despite hunger, suggesting a chemical cue role. The study's results demonstrate an early-stage embryonic kin recognition ability in this species.
Scientists at Max Delbrück Center for Molecular Medicine in the Helmholtz Association use a new spatial mapping algorithm to reassemble the fly embryo from thousands of single cells, revealing unique gene expression profiles. The virtual embryo shows exactly which genes are active where at this point in time.
Researchers develop a new imaging technique to assess early-stage embryo quality, improving IVF outcomes. The hyperspectral imaging method measures metabolic differences in embryos, providing an objective measure of viability.
Researchers identified lipid accumulation mechanism in oocytes, limiting in vitro bovine embryo success. Excessive fat buildup impairs embryo development and viability.
Researchers at NIH reveal that COUP-TFII determines sex-specific reproductive system development in mice. Female mouse embryos without COUP-TFII display both male and female ducts, indicating the active removal of male reproductive systems.
Researchers at Inprenha Biotecnologia have discovered a molecule that increases bovine pregnancy rates and reduces early embryo loss. The product, which enhances reproductive efficiency in domestic animals like cattle and horses, has been tested by the company and shown to be effective.
Researchers have developed a new microscope technique that allows for the first time to produce 3D images of live embryos in cattle, enabling the selection of healthy embryos before in vitro fertilization. This breakthrough could significantly improve IVF success rates and reduce costs.
Scientists successfully corrected a disease-causing mutation in human embryos using CRISPR-Cas9, increasing the probability of inheriting a healthy gene from 50% to 72.4%. The technique also revealed an alternative DNA repair system in human embryos.
Researchers successfully corrected a genetic mutation causing hypertrophic cardiomyopathy in human embryos, preventing its inheritance. The technique could apply to thousands of inherited genetic disorders and increase IVF success rates.
A study by Stanford Medicine and Celmatix Inc. found that elective freezing of IVF embryos can improve pregnancy rates in women with high progesterone levels and are over 35. Freezing the embryos before transfer may give hormones a chance to fall to more hospitable levels for implantation.
Researchers have successfully cryopreserved and revived zebrafish embryos using a novel method involving plasmonic gold nanoparticles. The technique has the potential to be applied to other species with similar embryonic sizes and structures, offering a breakthrough in preserving aquatic biodiversity.
Researchers at the University of Minnesota and Smithsonian Conservation Biology Institute have developed a new method for preserving zebrafish embryos using gold nanotechnology and lasers. This breakthrough technique has significant implications for human health, wildlife conservation, and aquaculture.
Spain now holds the pace of European ART with over 100,000 cycles performed annually, resulting in a steady pregnancy rate of around 35%. The data collected by ESHRE also reveals that IVF remains more successful than ICSI, but pregnancy rates from egg donation continue to rise.
A new study suggests that human embryo mortality rates are exaggerated, with many more embryos surviving than previously claimed. In vitro embryos also show poor survival rates, which may reflect the natural situation or be due to artificial environments.
Researchers found that administering certain drugs to make cells more negatively charged strengthens tadpoles' innate immune response to E. coli infection. Removing tail buds also increases survival rate.
Scientists at Goethe University Frankfurt have combined two advanced fluorescence microscopy techniques to observe cells with high-resolution imaging. The new technique, called csiLSFM, allows for three-dimensional insight into a cell's interior with sub-100nm resolution.
Couples adopting embryos in the US and New Zealand have formed extended family units, leading to over 500 births. Researchers found that open adoption systems enable children to learn about genetic factors and their place in the family.
A new species of giant bird-like dinosaur, Beibeilong, has been discovered in Henan, China. The fossilized remains include large eggs weighing up to five kilograms and an embryo found inside, revealing a previously unknown species of oviraptorosaur.
Pre-implantation genetic screening (PGS) has mixed results in predicting embryo success, with uncertain impact on IVF outcomes. The technology's limitations stem from complex biology and ideology, hindering the development of new technologies to improve infertility care.
Researchers found that friction between moving tissues generates force that shapes the nervous system of zebrafish embryos. This force is a key mechanism for regulating morphogenesis during embryo development. The study's findings indicate a previously unrecognized mechanism underlying birth defects in humans.
Researchers discovered that male hormones, specifically androgens, play a crucial role in the development of female chicken ovaries. The study found disruptions in ovarian structure when androgen receptors were suppressed, potentially affecting egg-laying rates.
Researchers successfully produced the first transgenic mice with a single nucleotide difference in the dystrophin and tyrosinase genes, demonstrating a new gene editing technique that can substitute one nucleotide into another without DNA deletion. This breakthrough could potentially lead to the correction of genetic defects in humans.
Broader updrafts in severe storms may lead to a higher chance of damaging hail. Research suggests that changes in environmental vertical wind shear can influence the growth of significant hail.
A metabolic pathway regulating the formation of a crucial embryonic structure has been discovered, shedding light on how embryos develop and how certain drugs can affect pregnancy. The study's findings have significant implications for understanding statin use in pregnant women and may lead to safer drug regimens.
A new lab technology in mouse studies could create embryos from sources like repurposed skin cells, offering potential benefits for infertility patients. However, it also raises concerns about ethics and the possibility of 'embryo farming' on a large scale.
A new study suggests that progesterone could be a key to preventing recurrent miscarriage in women who suffer multiple pregnancy losses. Researchers found that micronized plant-derived progesterone improved endometrial function and prevented pregnancy loss.
Groundbreaking study establishes a timeline for dinosaur incubation, suggesting 3-6 months. Researchers analyzed dinosaur embryo fossils using CT scans and microscopes to determine growth lines on teeth.
Researchers have created a novel method called RESA to identify mRNA-regulatory sequences in embryos, providing insights into the maternal-to-zygote transition and gene regulation. This breakthrough has broad applications for studying genetics and biology across various species.