Articles tagged with Blastocysts
Researchers analyzed single-cell transcriptome data to reconstruct communication networks among human preimplantation lineages. They found that signaling crosstalk between tri-lineages is crucial for lineage specification and cell fate regulation during human embryonic development.
A fully automated ICSI system has successfully conceived the world's first baby, promising to transform fertility treatment with greater standardization and consistency. The system, developed by Conceivable Life Sciences, uses AI to position sperm cells and execute microinjection with unprecedented accuracy.
A study found that smaller embryos already hatching are more likely to be chromosomally normal. This insight helps fertility clinics select better embryos during IVF, particularly for women over 35 or those undergoing PGT-A.
Researchers at Osaka Metropolitan University have successfully generated feline embryonic stem cells, a major breakthrough for veterinary regenerative medicine. The high-quality stem cells can differentiate into various cell types and be transplanted to restore internal damage.
Researchers have found that intraovarian PRP injection can improve the number and quality of blastocysts in POI mouse ovaries damaged by high doses of chemotherapy. The study also characterizes the protein content of PRP, suggesting its potential to enhance reproductive function.
A study by Jin et al. found that re-cryopreservation in blastocysts results in impaired development potential, decreased implantation rates, and lower live birth rates. The researchers discovered an association between re-cryopreservation and activated endoplasmic reticulum stress pathway and induced apoptosis.
A Chinese Medical Journal study developed an AI-based system to automate embryo selection and eliminate subjectivity in IVF. The system improved human embryo assessment and selection, achieving higher accuracy in embryo aneuploidy screening than experienced embryologists.
A novel 3D imaging model has been introduced to identify features of blastocysts associated with successful pregnancies, potentially transforming current IVF selection methods. The study found that parameters related to size and specific features of the inner cell mass and outer layer are linked to higher pregnancy rates.
A new technique, METAPHOR, visualizes embryo metabolism to predict implantation success and full-term birth, increasing the probability of success in assisted reproduction processes.
Researchers discovered a breakthrough in mouse embryo development, where primitive endoderm cells can generate an embryo on their own. These cells also have the potential to improve IVF outcomes by developing into stem cell-based embryo models.
Researchers discovered that nutrient depletion in mother's diet triggers embryonic diapause, pausing embryo growth until conditions improve. This finding could lead to improved fertility treatments and alternative methods for preserving embryos.
Embryos with morphologically non-good-quality blastocytes and those from women aged ≥ 35 years showed lower rates of implantation, clinical pregnancy, ongoing pregnancy, and live births after blastocyst shrinkage. Post-warming blastocyst shrinkage adversely affects ART outcomes.
A large randomized clinical trial found that culturing embryos for three days versus five days in the lab has no significant impact on live birth rates. Women's age affects outcomes, with younger women aged under 36 experiencing better results from cleavage-stage transfers.
A team of investigators created embryo-like structures from monkey embryonic stem cells and transferred them into female monkeys, which implanted and elicited a hormonal response similar to pregnancy. The study provides new tools and perspectives for exploring primate embryos and reproductive medical health.
A new method of conventional IVF has been successfully developed by Katrin Hinrichs and colleagues, resulting in three healthy foals born to recipient mares. The technique offers a simplified alternative to existing methods like ICSI, which require expensive equipment and training.
Researchers using 'blastoids' - in vitro models of the blastocyst - discovered that early embryonic signals induce placental development and prepare the uterus. The findings may contribute to a better understanding of human fertility and potentially improve IVF procedures, fertility drugs, and contraceptives.
Researchers developed a transgene-free method to convert human pluripotent stem cells into 8-cell totipotent embryo-like cells, paving the way for advances in organ regeneration and synthetic biology. These cells can be used to regenerate human organs, study human embryonic development, and prevent pregnancy loss.
Researchers have discovered molecules that could be candidates for contraceptives or fertility enhancers using human blastoid models. These models also show promise in improving the self-organization of stem cells during IVF procedures.
Researchers at KAUST have developed an in vitro model of early human embryogenesis using extended pluripotent stem cells, overcoming ethical concerns. The model, called EPS-blastoids, is a faithful representation of the earliest moments of human development and holds promise for studying developmental defects and regenerative medicine.
Researchers at University at Buffalo have published a detailed protocol for generating mouse-human chimeric embryos, enabling more accurate models of human development and disease. The method has the potential to revolutionize biomedical research and potentially lead to the generation of human organs for transplantation.
A large cohort study found that the transfer of embryos at the blastocyst stage and increasing use of embryo freezing are behind the improvements in IVF success rates. The study showed a significant increase in cumulative live birth rates over the decade, with single blastocyst transfers emerging as an increasing strategy.
An international team of scientists has generated a model of a human embryo from skin cells, called iBlastoids, which can be used to study the biology of early human embryos in the laboratory. The breakthrough allows for extensive study into causes of very early miscarriage and effects of toxins and drugs on early development.
Researchers at University at Buffalo have developed a method to produce millions of mature human cells in mouse embryos, which could lead to game-changing stem cell treatments for critical diseases. The technique involves converting human pluripotent stem cells into a form compatible with the inner cell mass inside a mouse blastocyst, ...
A bovine embryo successfully regenerates its placenta-forming cells, demonstrating a high regenerative capacity compared to mice. The study opens up possibilities for genetic testing and breeding cattle with improved qualities.
Researchers at Salk Institute create mouse blastocyst-like structures from single cultured cells, mimicking the natural developmental process. The blastoids can form a ball with an inner and outer layer, accumulating proteins that induce expression of proteins to build what could eventually become a placenta.
Researchers have successfully generated 3D blastocyst-like structures from mouse stem cells, exhibiting totipotency and inducing proper changes in the uterus after implantation. The study paves the way for improved basic research in embryogenesis and fertility, as well as regenerative medicine.
Osaka University researchers discovered a key regulatory mechanism in the development of normal pluripotent embryonic cells using the Hippo pathway. They found that TEAD and YAP proteins support pluripotency in blastocysts by activating cell competition, leading to elimination of low-potential cells.
A large cohort study confirms that blastocyst transfer is linked to a higher risk of preterm birth and large-for-gestational-age rates. The study found a 23% increased risk of being large for gestational age after fresh blastocyst transfer compared to cleavage stage transfer.
A new test may improve the accuracy of selecting healthy embryos for IVF by analyzing DNA leaked from human blastocysts. The test, known as niPGT-A, outperformed current PGT-A methods with a lower false positive rate.
A new noninvasive test for genetic disorders in embryos resulted in fewer false negatives and was less prone to errors compared to traditional trophectoderm biopsy. The study tested 52 human blastocysts and found the method to be more reliable with no false positives detected.
Researchers have identified a crucial role for the folliculin gene in embryo implantation. A deficiency in this gene can lead to infertility, as cells maintain their pluripotent state and fail to exit the pre-implantation stage. The study also highlights a connection between folliculin mutations and cancer, as well as its potential to ...
Researchers have successfully grown functional mouse kidneys inside rats from just a few donor stem cells, offering a promising solution to the global kidney shortage. The study, published in Nature Communications, used the blastocyst complementation method to generate human stem cell-derived organs.
An international team of scientists has successfully created a hybrid embryo from Southern White Rhino eggs and Northern White Rhino sperm using assisted reproduction techniques. The breakthrough is published in Nature Communications today, offering hope for the survival of the endangered species.
Researchers found that simultaneous genetic and chromosomal screening of a single biopsy improved pregnancy rates. The study used double genetic tests on cells taken from 1122 blastocysts, resulting in 99 pregnancies and 70 healthy births. This approach reduces the risk of implantation failure and miscarriage.
A new study found that paternal phthalate exposure before conception may be associated with lower-quality embryos, with certain chemicals inversely linked to high-quality blastocysts. The research, published in Human Reproduction, suggests a potential link between preconception environmental health and reproductive success.
Researchers discovered that NLRP2 is specifically produced by egg cells and becomes more important to fertility as the mice age. The study suggests that mutations in NLRP2 may give rise to early menopause and other conditions associated with maternal fertility decline.
UCSF researchers found a way to pause the development of early mouse embryos for up to a month in the lab by inhibiting a master regulator of cell growth. The treatment could improve outcomes in assisted reproduction and regenerative medicine, while also potentially slowing cancer growth.
A new approach to embryo assessment uses mitochondrial DNA quantification to identify viable embryos in IVF treatments. Studies have shown that embryos with unusually high levels of mitochondrial DNA rarely implant, supporting the use of this method as a marker of embryo viability.
A new study by Stanford bioengineers and physicians finds that measuring the rigidity of an hour-old fertilized egg can predict its viability more accurately than current methods. The technique, published in Nature Communications, could improve the success rate of single-egg IVF and ultimately benefit both mothers and babies.
Researchers discovered a regulatory element controlling gene Cdx2's function, crucial for embryonic and extraembryonic cell lineages. This finding helps understand early specification of trophectoderm, essential for mammalian development.
Whitehead Institute researchers have discovered a way to manipulate and maintain human ESCs in a "naïve" or base pluripotent state without reprogramming factors. This breakthrough has the potential to revolutionize human ESC research and may lead to new treatments for diseases.
Researchers have developed a method to identify embryos with chromosomal abnormalities using time-lapse imaging and morphokinetic analysis, avoiding invasive biopsies. This approach has shown significant improvements in implantation and live birth rates when low-risk embryos are transferred.
A new study published in Reproductive Biomedicine Online reveals that blastocysts' fluid-filled cavities contain DNA from the embryo, allowing for diagnosis of genetic diseases without biopsy. Researchers extracted fluid from embryos at the 5-day-old stage and detected cell-free DNA using PCR and DNA microarray analysis.
Researchers found that early embryos with chromosomal abnormalities can undergo a process of genetic normalization, leading to the correction of errors. This discovery has significant implications for preimplantation genetic screening and future stem cell treatments.
Auxogyn acquired exclusive license to develop noninvasive embryo assessment technology that can predict human embryo fate at the four-cell stage, allowing for improved IVF procedures and higher live birth rates. The licensed technology demonstrates a high degree of accuracy in predicting blastocyst formation.
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.
Researchers have found that transferring a single embryo at a time after preimplantation genetic diagnosis (PGD) and freezing at the blastocyst stage results in comparable pregnancy rates to those for non-biopsied embryos. This approach can reduce multiple pregnancies and their associated complications.
Researchers have successfully applied DNA fingerprinting to identify viable embryos after in vitro fertilization (IVF), opening the door for more precise embryo selection. By analyzing gene expression patterns, they aim to improve IVF outcomes by reducing multiple pregnancies and increasing successful births.
According to a study published in Fertility and Sterility, nearly 60% of IVF procedures performed on women over 35 result in successful pregnancies. The researchers found an excellent pregnancy rate for patients undergoing single blastocyst transfer, with 62.2% conceiving and 51.1% having pregnancies beyond the first trimester.
Researchers used time-lapse recordings to study IVF embryo development, finding that extended culture increases the likelihood of twinning. Blastocyst collapse may be caused by failed cell junctions, leading to degeneration and the formation of a second inner cell mass.
A recent paper by Dartmouth Professor Ronald M. Green examines six approaches to deriving human embryonic stem cells in ways that avoid destroying living human embryos. These alternatives aim to make hESC research more universally acceptable, while respecting the sensitivities of citizens.
An independent committee concluded that journal editors at Science went above and beyond existing procedures to verify fraudulent stem-cell research articles, but the committee found that the cachet of publishing in Science can be an incentive not to follow the rules. The committee proposed developing a procedure for identifying high-r...
Researchers at Whitehead Institute have concluded that cloned and fertilization-derived stem cells are indistinguishable, with similar gene-expression profiles. This breakthrough paves the way for individualized cellular therapies for treating certain disorders.
Scientists have successfully developed a proof-of-concept for Altered Nuclear Transfer (ANT), an alternative to somatic cell nuclear transfer (SCNT) that enables the creation of genetically altered embryos without implantation. The method uses RNA interference to disable genes in donor nuclei, producing stem cells with disabled Cdx2 fu...
Researchers have developed a new method to obtain embryonic stem cells from early-stage embryos, potentially reducing embryo wastage. The technique was successful in mice and shows promise for human application.
Researchers have identified a major pathway leading to chromosomal and nuclear abnormalities in preimplantation embryos. Abnormal spindles during cell division can lead to chromosomal chaos, affecting embryo development and implantation rates.
A high-protein diet may disrupt genetic imprinting in mouse embryos, affecting foetal development and implantation rates. Research suggests that women trying to conceive should limit their protein intake below 20% of total energy consumption.
Researchers have developed versatile human embryonic stem cells capable of becoming any cell type, offering potential for transplantation medicine. The cells were created by transferring a somatic cell nucleus into an egg, reprogramming its genes to produce pluripotent stem cells.
A study published in Nature Medicine suggests that high glucose levels during pregnancy can lead to embryonic cell death, resulting in higher rates of miscarriage and birth defects among diabetic women. The researchers found that controlling blood sugar levels is crucial for pregnant women with diabetes.