Articles tagged with Eggs
New research reveals distinct differences in early human embryo development among overweight and obese women compared to those of a healthy weight. These differences may have long-term health implications for their children.
Researchers from NUS observe a new reproductive mode in critically endangered white spotted bush frogs, breeding and laying direct-developing eggs in live bamboo. The discovery sheds light on the unique behavior of these frogs and highlights the importance of conservation efforts to protect their habitats.
Research shows that larger females produce far more eggs than smaller fish, increasing population productivity and stability. Older fish also provide a 'storage effect', allowing them to spawn successfully when conditions are favorable.
A study led by Professor Kui Liu has identified the Greatwall kinase molecule as a key protector of women's eggs against problems during maturation. The molecule is crucial for completing meiotic divisions and preventing infertility issues in up to 15% of women.
Fertility experts advocate for making ovarian tissue and egg freezing options widely available to healthy women. The techniques have restored fertility in female cancer patients and enabled the birth of nearly 2000 babies without an increase in birth defects.
A study found that warmer winters lead to earlier breeding in wood frogs, resulting in fewer eggs and delayed tadpole development. However, more rain and snow appear to increase egg production, potentially counteracting the negative effects of warming.
Hansen's tree frog embryos hatch earlier after being preyed upon by katydids, responding to chemical cues. This flexible hatching behavior allows the frog an adaptive advantage, as it gives them time to escape into the next life-stage.
Researchers found that hoopoes' eggs change from bluish-grey to greenish-brown when exposed to preen gland secretion, which contains antimicrobial properties. This color change may serve as a signal about the mother bird's breeding quality.
Researchers found that boat noise stops embryonic development and increases larval mortality in sea hares. This study underscores the impact of anthropogenic noise on vulnerable species, potentially disrupting coral reef ecosystems.
A deep-sea octopus has been found to protect and nourish its eggs for an astonishing 53 months, with 160 eggs hatching almost 4.5 years later. This record-breaking brooding period highlights the importance of parental care in producing well-developed offspring in challenging environments.
A deep-sea octopus species has been observed brooding its eggs for four and one-half years, a record-breaking duration. The female kept the eggs clean and guarded them from predators, while also ensuring the young octopuses developed fully within their eggs.
Researchers have ruled out the 'Production-Line Hypothesis', which suggested that faulty chromosomes are more common in eggs produced later in a woman's reproductive life. The study found no relationship between a woman's age and chromosome crossovers, suggesting other factors may be involved.
A study by Dr Ana Cobo found that cumulative live birth rates increase progressively with the number of vitrified eggs used, reaching a plateau at 97.3% with 40 eggs. Egg banking can provide a large pool of donor eggs without synchronizing cycles, making it a more efficient and safer process.
A large case-control study found that pregnancies from egg donation are associated with a higher risk of pregnancy-induced hypertension and pre-eclampsia. The study included over 580 pregnancies and found that the risk was more than three-fold higher for routine IVF patients.
Researchers at Harvard University discovered that many birds targeted by the Common Cuckoo have evolved recognizable egg patterns to distinguish their own eggs from those laid by cuckoo cheats. These signatures provide a strong defense against cuckoo mimicry, helping host birds reject foreign eggs and protect their broods.
Researchers found that some bird species have evolved recognizable egg patterns, such as blotches and markings, to detect cuckoo eggs. These signature patterns provide a powerful defense against cuckoo trickery, increasing the likelihood of host birds rejecting foreign eggs.
Researchers have found the first three-dimensionally preserved pterosaur eggs in China, providing new insights into the flying reptiles' reproductive strategy, development, and social behavior. The discovery suggests that pterosaurs lived together in gregarious colonies, with males and females having distinct head crest features.
Researchers found that female mice deprived of dietary zinc before conception experienced fertility problems and had smaller, less-developed fetuses. Zinc deficiency caused a high incidence of pregnancy loss and delayed or aberrant embryo development.
Scientists discovered that the selection process of immature eggs is connected to segments of DNA known as transposable elements. A drug called AZT may enhance the quality and number of eggs by altering jumping gene activity in immature eggs.
A study by NUS researchers found that the Chiromantis hansenae treefrog exhibits unusual parental care behavior to increase offspring survival. This behavior is crucial for preventing egg desiccation and buffering environmental pressures.
A new study reveals that heat favours the production of male progeny in parasitoid insects, while cold temperatures impair gender selection. The research found an 80% increase in male offspring at high temperatures.
Researchers found that higher-protein breakfasts provided increased feelings of fullness and lesser calorie intake at lunch compared to lower-protein breakfasts. Optimal amounts of protein at breakfast can help with hunger control and blood glucose stability.
Scientists confirm the mafia hypothesis, which suggests that birds cooperate with parasitic birds to avoid retaliation, increasing survival rates of parasites. Host birds must learn and adapt to reject foreign eggs, while parasites use their behavior to extort hosts.
A new study from the University of Southampton has found that chromosome errors in women's eggs occur due to a faulty gatekeeper mechanism. The researchers discovered that this 'gatekeeper' allows cells to divide with incorrect chromosomes, leading to conditions like Down Syndrome and early pregnancy loss.
A recent study from the University of California, Davis, analyzes the ovipositor and behavior of Drosophila suzukii, a fruit fly known to deposit eggs inside ripening fruit. The research highlights the potential for this pest to spread rapidly across North America.
A recent study published in Human Molecular Genetics describes two distinct types of eggs in the mammalian ovary, contributing to puberty and fertility. The identification of these 'first wave' and 'adult wave' eggs may lead to improved treatments for ovarian diseases like premature ovarian failure.
Adjustments to Priest Rapids Dam's water discharges boosted juvenile salmon numbers by 283%, from 14 million to over 52 million annually. Keeping eggs and young fish under water during vulnerable times improved survival rates.
A study published in Poultry Science reveals a significant reduction in environmental impact from US egg production, thanks to advancements in feed efficiency, hen housing and manure management. The industry has decreased greenhouse gas emissions, water usage and waste production, while increasing egg production and hen lifespan.
Scientists have estimated that sauropod body temperature was around 28 degrees Celsius, contradicting the idea that their size was limited by overheating. The research also explores the reproductive biology of sauropods and the potential for convergent evolution in their bone structure.
Fossil evidence reveals that ancient sharks, such as Bandringa, bred in the open ocean and spent their lives in freshwater swamps and rivers. The discovery of juvenile shark fossils alongside egg cases provides the first fossil evidence for a shark nursery that combines both juvenile and adult remains.
A new study published in Annals of the Entomological Society of America has found that low temperatures can be used to store eggs of the predatory stink bug Podisus nigrispinus. This allows for greater flexibility in mass rearing and storage, increasing the availability of insects for release in the field at an early opportunity.
A new study revises the cuckoo wasp genus Cleptes in China, discovering nine beautifully colored new species. The study highlights the genus' unique parasitoid habits, where they lay eggs in host nests and consume provisions after eliminating competition.
Researchers found that tree sparrows can identify parasitic eggs by color and shape, ejecting 81% of non-native objects. The birds' ability to recognize foreign eggs is linked to motivation and nest sanitation, with some species being more careful during incubation.
A new study has shown that egg development in malaria mosquitoes depends on a switch activated by a male hormone delivered during sex, which could be a viable strategy for controlling the disease. Blocking this switch may impair the ability of the species to reproduce.
The number of donor eggs used in IVF has increased significantly in the US, from 10,801 in 2000 to 18,306 in 2010. Good perinatal outcomes also improved, with a rise from 18.5% to 24.4%, while average donor age remained stable at 28 years and recipient age was not associated with outcomes.
Researchers at Stanford University School of Medicine have developed a technique that induces egg growth in some infertile women, allowing five of them to produce viable eggs for in vitro fertilization. The successful pregnancy and birth represent a breakthrough for women with primary ovarian insufficiency, who often rely on egg donation.
Research reveals honeyguides lay eggs resembling host bee-eaters' eggs to avoid destruction by rival females. This mimicry helps conserve reproductive success in competitive environments.
Researchers from the University of Nottingham identified a genetic mutation causing blue eggs in native South American and European breeds. The mutation triggered an accumulation of biliverdin, a green-blue pigment, in the eggshell. This finding could inform future research on agricultural breeding techniques.
A study of almost 10,000 first cycles of egg donation treatment found that female obesity reduces uterine receptivity to embryo implantation, compromising reproductive outcome. Obese women had significantly lower rates of embryo implantation, pregnancy, twin pregnancy, and live birth compared to normal-weight women.
A unique shell design on guillemot eggs allows them to survive exposed cliffs with no nests. The nano-scale cone-like structures act as self-cleaning guardians, preventing eggs from falling and protecting them from salt and guano exposure.
A recent study published in ZooKeys reveals 32 new parasitoid wasp species from the genera Odontacolus and Cyphacolus, characterized by their unique horn-like structure. These tiny wasps are known to be vicious parasitoids, injecting eggs into spider eggs to ensure the development of their offspring.
Researchers from New York Medical College and University of California Davis have developed an individualized patient data meta-analysis to report the probability of live birth after in vitro fertilization (IVF) with frozen eggs. The study shows that egg freezing success rates decline with age, with a sharper drop after age 36.
A new study reveals that the Mediterranean anuran frog Rana iberica inhabits cave-like habitats, with all life stages observed. The frog's use of artificial subterranean habitats has important implications for its conservation, particularly in light of climate change.
Scientists can now better study human disease using induced pluripotent stem cells (IPS), which can generate any cell type. This technology reduces the risk of organ/tissue rejection in cell transplants and allows for the correction of mutations in IPS cells.
Researchers found that a small meat-eating dinosaur called Troodon likely hatched its young in a way similar to brooding birds. The study provides insights into how dinosaurs incubated their eggs and supports the close evolutionary relationship between birds and dinosaurs.
A team of scientists from Canada, Taiwan, and Australia excavated over 200 bones from embryonic dinosaurs, providing a rare glimpse into their growth patterns. The fossils, dating back over 100 million years, show evidence of protein structures, suggesting that dinosaurs moved around inside their eggs.
A new study suggests that swallows and martins in Europe build their nests close to humans to reduce the risk of cuckoo parasitism. By breeding indoors, these birds can avoid ejecting model cuckoo eggs from their nests, thus reducing the likelihood of cuckoo parasitism.
Researchers explore naturally occurring egg-hatching factors to control G. pallida, a non-native species causing economic hardship in US potato fields. Using these chemicals to stimulate eggs to hatch when no potato plants are present could be an effective defense against the pest.
A team of scientists has successfully revived the DNA of an extinct Australian frog species, Rheobatrachus silus, using somatic cell nuclear transfer. The 'Lazarus Project' aims to bring back the bizarre gastric-brooding frog, which uniquely swallowed its eggs and gave birth through its mouth.
Researchers at the University of Illinois discovered that adult, non-sexual stem cells in S. mansoni can migrate to various parts of its body and replenish tissues. This finding may provide insight into the parasite's extraordinary staying power.
A recent study found that women with high anti-Müllerian hormone (AMH) levels are 2.5 times more likely to have a successful IVF cycle than those with low levels. High AMH levels also signal increased chances of pregnancy and live birth, regardless of the number of eggs retrieved.
Researchers have developed a new technique to study cell division without a cell membrane, allowing them to uncover physical forces and constraints involved in the process. By using this method, they discovered that squeezing the 'cell' into tighter quarters does not lead to smaller spindles, contradicting previous assumptions.
Researchers discovered that female quail select egg-laying substrates based on the unique characteristics of their own eggs, maximizing disruptive coloration to avoid predation. By matching their egg patterning with surrounding colors, quail reduce the likelihood of their eggs being detected and eaten by predators.
Researchers found that embryonic sharks can detect electric fields emitted by potential predators and respond by reducing respiratory movements. This innate avoidance response allows them to recognize dangers and try to escape, even in vulnerable egg cases.
Researchers at Penn State discovered that plants can detect and respond to insect odors, leading to improved defenses. The tall goldenrod plant's ability to sense the sex attractant emitted by male flies makes it less appealing to female flies, reducing damage and increasing seed quality.
A new study reveals that mixing oil with dispersants used in the 2010 Gulf of Mexico clean-up increases toxicity up to 52-fold, harming rotifers and potentially marine food webs. The study's findings suggest that natural dispersal may be a less toxic alternative to current methods.
Studies found that half of children with egg allergies can tolerate baked eggs, and 55% outgrow the allergy entirely. Baked eggs are found to be less allergenic than raw eggs, making them a safer option for those with egg allergies.
Climate change is altering rainfall patterns in Panama, which affects frog reproductive strategies. Some species, like the pantless treefrog, may adapt to changing conditions by switching between aquatic and terrestrial egg-laying.
A new study by WSU geneticist Patricia Hunt and colleagues reveals BPA can damage chromosomes, disrupt egg development, and increase the risk of miscarriages and birth defects in rhesus monkeys. The research bolsters earlier findings on reproductive effects in rodents and raises concerns about human exposure to this common chemical.
Researchers at the University of Gothenburg have discovered a chemical that can mature small eggs to healthy, mature eggs, offering new hope for women struggling with infertility. The breakthrough could provide an alternative method to preserving fertility in girls who have not yet reached puberty.