Articles tagged with Embryos
A Joslin study found that stimulation of the metabolism-sensing enzyme AMP kinase regulates crucial gene expression, causing neural tube defects and other heart defects in babies born to diabetic mothers. Even with controlled blood sugar levels, the risk is still twice that of the general population.
Researchers at EPFL discover that specific genes, known as Hox, are involved in this process, situated one after the other on the DNA strand. The genes unfold like an old-fashioned computer punchcard, delivering instructions for each new layer of the embryo to be built.
Researchers found that Vax proteins deploy a weapon to disarm the dorsalizer Wnt, leaving the embryo free to develop a proper brain. The study's findings define how the embryonic nervous system develops and could shed light on mechanisms underlying colon cancer.
Embryos avoid fatal chaos through a synchronized cell cycle mechanism triggered by the calcium wave, which sets cells to the same developmental timetable. The researchers' simulation shows that this rapid spread of oscillation is crucial for preventing disarray and ensuring the embryo's survival.
A study published in the European Physical Journal B demonstrates that embryo development follows hydrodynamic principles, where cells flow like a fluid, resulting in the formation of the head. This challenges previous theories suggesting chemical gradients drive cell movement, providing new insights for regenerative medicine.
Research found that embryos exposed to high levels of saturated fatty acids have fewer cells, altered gene expression, and impaired metabolic activity. This study suggests a link between maternal obesity and diabetes and reduced fertility, highlighting the importance of pre-pregnancy health for successful conception.
Researchers at the Smithsonian Conservation Biology Institute have discovered that older females are rarely able to reproduce due to abnormal cell growth, infections, and cysts in their uterine tracks. The study's findings offer hope for introducing new genes into the cheetah population through embryo transfer.
A Quebec-based study shows a significant reduction in multiple pregnancies after implementing single embryo transfers, sparking debate on the balance between patient rights and government intervention in IVF treatment. Experts weigh in on the ethics of regulating assisted reproductive technology.
Scientists have observed three stages of bioelectric activity that shape the developing face, including a wave of hyperpolarization that marks eye formation and gene expression domains. Disrupting this signaling can lead to craniofacial abnormalities.
Two studies found that frozen embryo transfer (FET) is associated with significantly higher birth weights and larger babies. FET was found to have a similar effect on small-for-gestational-age (SGA) children compared to naturally conceived children.
A recent study by Professor Michael Davies reveals that the 'vanishing twin' phenomenon is associated with a nearly two-fold increased risk of any congenital malformation and nearly three-fold risk of multiple malformations in surviving babies. The research also found that early pregnancy loss, including loss before six weeks, is linke...
Researchers investigated predictors of adverse outcomes in IVF singletons, finding associations with preterm birth, small for gestational age, and placenta previa. Maternal smoking, BMI, and years of infertility were linked to increased risks of these conditions.
Researchers found that maternal height over 1.74cm and multiple oocyte retrieval (11+) are associated with twin pregnancies in IVF treatment. The study may lead to personalized fertility treatment with predictive models for choosing single or double embryo transfers.
A research team at Caltech has outlined exactly how specific sets of cells in sea-urchin embryos differentiate to become the endoderm, the early domain of the embryo that eventually forms the gut. They found that certain regulatory genes are expressed in the cells of each domain and that this process is dynamic, with gene expression ch...
A new study published in Nature suggests Mars developed rapidly into a small planet due to its rapid formation. Scientists used the radioactive decay of hafnium to tungsten in meteorites as a chronometer and found that Mars likely didn't collide with other embryos to form an Earth-like planet.
A study analyzing over 400,000 IVF cycles in the UK found that aiming for 15 eggs retrieved per cycle maximizes live birth rates while minimizing ovarian hyperstimulation syndrome risk. The number of eggs above 20 leads to a decline in live birth rates.
New research reveals that thalidomide's toxic effects on embryos result from its breakdown products producing reactive oxygen species, causing DNA damage and birth defects. The study uses a rabbit embryo culture model to demonstrate the link between thalidomide and its hydrolysis products.
A new study suggests that stronger regulations on single embryo transfers during IVF could save lives and reduce healthcare costs. The research found that a significant decrease in risk of premature birth and medical complications would occur with mandatory single embryo transfers.
A new process developed by Stanford researchers allows people to make IVF embryo donation decisions in private, reducing conflicts of interest. The study found that donors were equally likely to give consent for embryonic stem cell research or human development studies.
A McGill biologist's findings raise doubts about the Differential Adhesion Hypothesis, proposing that repulsive cues may drive tissue formation instead of adhesion. The study reveals a cycle of adhesion followed by repulsion at embryonic cell boundaries.
A new study by Yale researchers found that states with insurance coverage for infertility have significantly lower multiple birth rates. The study analyzed assisted reproductive technology cycle data and found a reduction in twin and triplet births among younger women, leading to improved maternal-fetal health and economic savings.
Scientists have discovered algae living inside the cells of developing spotted salamanders, marking the first known example of a eukaryotic algae endosymbiont in vertebrates. This finding highlights the complexity of animal-algae interactions and raises questions about the evolutionary origins of mitochondria and chloroplasts.
Scientists have isolated two chemicals from an ancient herb that can block melanin production, making it a promising alternative to toxic skin whitening creams. The chemicals are 100 times more effective in reducing melanin pigmentation than common skin whitening agents.
A new study published in Fertility and Sterility reveals that the health of a woman's uterus is more relevant than egg quality for a successful pregnancy outcome. The research found that babies born from frozen embryo transfer cycles had markedly greater birth weights compared to those born through standard IVF.
A recent study published in PNAS has confirmed that elephant fish, a shark cousin, share a common genetic process with mammals to form skeletal gill covers. The precise timing of gene expression during embryonic development produces dramatic anatomical differences between the two species.
Scientists identify Fates-shifted protein as key player in Bicoid's degradation, leading to improper embryo formation and misshapen offspring. The study highlights the importance of understanding embryonic development in fruit flies for medical research into human disease and birth defects.
Two methods for culturing and imaging Caenorhabditis elegans embryos are described, enabling researchers to visualize dynamic form and function of molecules, cells, tissues, and whole embryos. Meanwhile, a method for isolating and culturing early mouse embryos is also presented, allowing time-lapse imaging of cell movements.
A team of researchers has developed a novel identification system for mouse embryos by injecting silicon barcodes into their perivitelline space. The system enables the tracing of individual embryos during in vitro fertilization and embryo transfer procedures, reducing risks associated with human gamete and embryo identification.
Researchers at NC State University have developed a new methodology to precisely control and study gene function in localized areas of developing organisms. By using UV-light activated 'off switches' called morpholino oligonucleotides, scientists can now turn off specific genes only when exposed to UV light.
The European Society of Human Reproduction and Embryology has published new guidelines for Preimplantation Genetic Diagnosis (PGD). The guidelines cover the organization of PGD centers, laboratory methods, clinical protocols, and follow-up recommendations. PGS is also included in the guidelines.
Australian scientists have developed a measure to assess embryo health and likelihood of successful pregnancy in IVF treatment. The research found that embryos with higher glucose uptake are healthier and more likely to result in successful pregnancies, with women's embryos consuming more glucose than men's.
Researchers at Kiel University found a unique antibacterial peptide in Hydra embryo that prevents benign bacteria from colonizing. This mechanism helps protect the embryo and potentially other organisms, altering the composition of bacterial colonization in adults as well.
Researchers at Stanford University School of Medicine have developed a method to predict embryo survival with 93% accuracy, allowing for improved selection of embryos for transfer during in vitro fertilization. This breakthrough could reduce the likelihood of miscarriage and improve pregnancy rates.
A new study by Texas A&M AgriLife Communications found that using test-tube calf embryos can double pregnancy rates and increase heifer births during the summer months. The method uses fresh or frozen embryos fertilized in a lab, bypassing heat stress's negative effects on fertility.
Research from Northwestern University found that healthy eggs require high levels of zinc to mature and be fertilized. The study may lead to advances in fertility treatment by enabling doctors to assess the best eggs for successful embryo formation.
Researchers at EMBL developed a technique to capture high-quality images of fruit fly embryos and zebrafish development, revealing previously unseen details. By combining multiple images and angles, scientists can now study complex processes in real-time.
Researchers have found vitrified eggs produce on-going pregnancies with similar success as freshly harvested oocytes. The study's results will improve egg banking practices, enabling cancer patients and others at risk of infertility to access fertility treatment more safely.
A study of 15,162 children born after assisted reproduction found a major congenital malformation rate of 4.24%, exceeding previous estimates. The majority of malformations were heart diseases and uro-genital system disorders, with a five times higher rate of angioma in girls.
Researchers have found that anoxia-induced suspended animation can protect organisms from extreme cold, preserving cell-cycle control and preventing biological instability. This discovery may lead to improved techniques for extending the shelf life of human organs for transplantation.
Researchers from Instituto Gulbenkian de Ciencia found that making ribs is an active process in vertebrates, balanced by Hox genes. They discovered a coordinated mechanism controlling the production of both ribs and associated muscles.
Scientists have discovered how plants form their first roots by identifying key genes and hormones involved in the process. The discovery of transcription factor MONOPTEROS and its role in activating genes TMO5 and TMO7 could lead to breeding plants with improved root systems.
Researchers have developed a methodology to measure nanoparticles in chicken embryos, shedding light on their potential effects on human health. The study's findings will inform regulatory approaches and help make nanotechnology more sustainable.
A gene family called Dishevelled has been found to direct the migration of cilia on an embryo's node cells, which is crucial for left-right symmetry breaking and organ positioning. The finding provides insights into how certain birth defects occur in humans.
Researchers developed a device that gently rocks embryos during in vitro fertilization (IVF), improving pregnancy rates in mice by 22%. The procedure may lead to significantly higher IVF success rates in humans, reducing the incidence of twins and triplets.
Researchers at Caltech have challenged the long-held theory on fruit-fly development, showing that a key transcription factor's influence is less widespread and varies over time. The study reveals a more complex system where cells respond to changing signals from the transcription factor Dorsal.
European consortium identifies Hox genes as key regulators of vertebral development, controlling both type and number. Cdx genes also play a crucial role in embryo growth, with Hox activation compensating for Cdx deficiency.
Researchers at Yale University developed a non-invasive test to assess embryo viability for IVF, based on metabolomic profiling of spent embryo cultures. The study found that this approach affected pregnancy outcomes in women treated in Europe and Australia.
A study by Yale researchers found that states with IVF insurance coverage have lower rates of multiple births compared to those without such coverage. The study suggests that increased costs for couples and insurance companies may lead to more embryos being transferred, resulting in higher-order multiple births.
Researchers at Iowa State University are working on an embryonic test that can determine a calf's genetic soundness before birth, allowing producers to select valuable embryos and reduce waste. The new technology has the potential to revolutionize cattle breeding and marketing, enabling producers to target specific traits and markets.
The use of genetic diagnosis in embryos raises concerns about eugenics and perfect child policies. Research shows that parents avoid having children with severe diseases they already carry, rather than seeking a 'perfect' child. Inflammatory language can fuel the debate, but evidence-based policy and practice are needed.
Researchers have made significant breakthroughs in preserving fertility among cancer patients, including the development of lab-grown eggs and a new understanding of cellular mechanisms that can help restore fertility. These advancements offer hope for young cancer patients who are struggling to preserve their reproductive options.
A recent study found that women with diminished ovarian reserve are at increased risk of trisomic pregnancy, regardless of age. The study analyzed data from 19,840 women undergoing fertility treatment in the Netherlands and found a history of ovarian surgery, low egg retrieval, or menopausal status to significantly increase trisomy risk.
A study found that babies born from frozen embryos fertilized via ICSI or standard IVF treatment have similar outcomes, including Apgar scores and birth weights. However, there was a slightly higher rate of malformations in medicated cycles.
A new genetic test has increased pregnancy rates for older women undergoing IVF by 20% compared to 10% without the test. The test examines chromosomes in human eggs after fertilization and identifies healthy embryos, reducing chromosomal abnormalities and congenital issues.
The European Society of Human Reproduction and Embryology reports an estimated 219,000 to 246,000 babies born through assisted reproductive technology (ART) globally each year. ART procedures have increased by over 25% in two years, with significant variations in availability and quality between countries.
A study using genetically modified mice found a link between low levels of inositol and neural tube defects, such as spina bifida. The research suggests that increasing inositol doses may help prevent these birth defects.
Researchers found that twins conceived through assisted reproductive technology (ART) have a higher risk of complications such as preterm birth, low birth weight, and death compared to spontaneously conceived twins. ART twins also require longer hospital stays and are more likely to be admitted to neonatal intensive care.
A study published in Human Reproduction found that single embryo transfer (eSET) is more effective and cheaper than double embryo transfer. eSET reduces multiple pregnancies by half and saves patients an average of €19,889 per live birth at term.
A new study by Stanford researchers has developed a method to assess the quality of women's eggs, which could enhance IVF success rates. The non-invasive test uses metabolomic profiling to identify unique biomarkers in the eggs that predict embryo viability and pregnancy rates.
Researchers discover that fruit fly embryos can 'forget' incorrect body plans and develop into recognizable adult flies through cross-regulation among gap genes. This process, known as canalization, allows for robust development despite variable conditions, shedding light on the mechanisms of genetic interactions.