Articles tagged with Eggs
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A new study found that pregnancy rates are higher for fresh embryo transfers compared to frozen embryo transfers in cycles using freshly retrieved donor eggs. The study also showed that live birth rates remained higher for fresh embryos even when compared to frozen embryos known to contain the normal number of chromosomes.
A new study on Megalodon's reproductive biology sheds light on its growth and life expectancy. Researchers found that the shark gave live birth to babies larger than most adult humans, which likely fed on unhatched eggs in the womb.
A bio-pesticide made from safflower and cottonseed oils has been found to work against two-spotted spider mites by preventing their embryo from rotating within its eggshell for hatching. This allows the pesticide to spare the mites' natural predators, making it a promising eco-friendly solution for farmers and gardeners.
Researchers at Shinshu University discovered that silkworms use thermal information to determine when to lay dormant eggs. The neuropeptide corazonin plays a key role in regulating this process, and its release is controlled by GABA neurotransmission.
Researchers found that chestnut-crowned babbler birds adapt to rising temperatures by breeding earlier, but this reduces successful breeding due to cold temperatures. The study suggests these birds fall into an ecological trap, highlighting the need for further research on adaptable parenting.
A team of researchers led by the University of Tsukuba examined five different stonefly species' eggs to understand their evolutionary relationships. They found that differences in egg structure, such as hard outer membranes and attachment structures, provided insight into the order's ground plan and evolutionary history.
UTA researchers resurrected preserved Daphnia eggs to investigate how species adapt to invaders, finding extensive genetic variation in responses to a novel predator. The team's work allows for real-time observation of evolutionary processes, shedding light on drivers of change in natural settings.
Researchers have developed a single-cell technique to assess the effects of age on egg cells in mice, identifying genomic and epigenetic factors that affect reproductive competence. The study provides new insights into mechanisms underlying egg quality and could lead to techniques to assess human egg cell quality.
A longitudinal study found that consuming one or more eggs per day increases the risk of diabetes by 60%. Higher long-term egg consumption is also associated with an increased risk of diabetes, especially in women. The study's findings highlight the importance of a balanced diet in preventing type 2 diabetes.
Researchers studied Nocticola sp. cockroaches to better understand their evolutionary history, shedding light on a 'lost' family of insects that may be the missing link in the evolution of insects from prehistoric times to the present day.
Researchers found that coral larvae temporarily stop swimming due to reduced light intensity and then resume swimming at their initial speed. This behavior may play a role in determining where corals settle, with the larvae gathering in bright spaces.
Researchers compare microstructure and composition of five Mexican dinosaur eggs to determine the unknown eggshell's species. The study finds that the unknown sample closely resembles ornithopod shells, supporting hypothesis it belongs to the hadrosaur family.
A study using GPS-enabled decoy sea turtle eggs gathered evidence of the illegal trade and tracked eggs from beaches to restaurants and bars in Central America. The findings suggest that most stolen eggs remain in local areas, making it crucial to target conservation efforts towards local communities.
Research reveals that a group of parasitic finch species in Africa have evolved to mimic their host's chicks with astonishing accuracy. The study found that nestlings of these 'brood-parasitic' finches mimic the appearance, sounds and movements of their grassfinch host's chicks.
Researchers at Oregon State University have identified four new species of parasitic, cockroach-killing ensign wasps that became trapped in tree resin and fossilized into amber 25 million years ago. The discovery reveals the wasps' long history of controlling cockroach populations and sheds light on their behavior.
Researchers at Champalimaud Centre for the Unknown discover that changes in sex cells' nutritional requirements make female flies crave sugar, affecting their food choice and fertility. The study's findings suggest a novel mechanism by which metabolism controls feeding behaviour, potentially relevant to human fertility.
Scientists have made a groundbreaking discovery of a perfectly preserved dinosaur embryo, revealing that sauropods had stereoscopic vision and a horn on the front of their face. The discovery has challenged previous theories about the appearance of these giant herbivores, which lived 80 million years ago.
Researchers at Cornell University developed a new method using thin mesh covering, called exclusion netting, to control spotted wing drosophila infestation in New York berry crops. The technique has shown significant benefits, including reduced pesticide use and lower costs, with minimal SWD incidence.
The Flamboyant Cuttlefish's skin is usually camouflaged nearly all of the time, but it flashes a dazzling display only on specific occasions, such as during courtship rituals, fighting over females, or when threatened. This unique display allows them to signal aggression or attract mates.
A researcher at the University of Texas at Arlington is using Daphnia, or water fleas, to study the long-term evolutionary impacts of nuclear testing. By hatching decades-old eggs and measuring their viability and traits, Matthew Walsh aims to understand how nuclear-induced mutations affect generations of water fleas.
Researchers tracked the evolution of stellar eggs in Taurus, discovering internal structures and bipolar gas streams that indicate a star's birth. The team used ALMA's compact array to observe starless cores and found evidence for 'first hydrostatic cores,' short-lived objects formed before a baby star's birth.
A 20-year study found that 16% of cancer patients used their frozen eggs and embryos, with a remarkable 71% birth rate among those who did. Fertility preservation can be effective for young women diagnosed with cancer, with ovarian tissue cryopreservation and oocyte freezing offering good options.
A new study reveals a nest of exceptionally small non-avian theropod egg fossils in Japan, providing insights into Early Cretaceous ecosystems. The Kamitaki Egg Quarry yielded over 1300 fossil eggs, mostly belonging to the newly discovered Himeoolithus murakamii genus.
Researchers found a seasonal bias in the sex ratio of brown-headed cowbird offspring, with more female hatchlings emerging in May and July. The study suggests that male and female cowbirds may have different developmental trajectories, influencing their survival and breeding success.
Researchers found that fish eggs can survive gut passage in ducks, with 0.2% of eggs intact after 24 hours. This process may play a key role in the dispersal of invasive fish species, such as Prussian carp, across wide geographic areas.
Scientists have found that the first dinosaurs laid soft-shelled eggs, contradicting long-held assumptions. The study analyzed the eggs of two non-avian dinosaurs and found they resembled those of turtles in terms of microstructure and mechanical properties.
A giant, soft-shell egg from about 66 million years ago has been discovered in Antarctica, challenging prevailing thought that such creatures did not lay eggs. The egg is the largest soft-shell egg ever found and may have belonged to an extinct sea lizard or mosasaur.
A study on chicken adaptation reveals that genetic changes play a more prominent role when organisms return to their ancestral homelands. Researchers found that plastic phenotypic changes are sufficient to help animals adapt when reintroduced to familiar environments, but mutation-induced changes are necessary for initial adaptation.
A mathematical model developed by Rutgers University scientists can help explain why many pregnancies and IVF attempts fail. The study highlights the importance of understanding errors in female cell division, which increase with age and are linked to aneuploidy, a leading cause of early miscarriage and IVF failure.
A new study finds that a type of fungus can cut the soybean cyst nematode's reproductive success by more than half, reducing yield losses of over $1 billion annually. The fungus, Funneliformis mosseae, reduces nematode egg hatching and juvenile nematode populations, making it a potential tool for controlling the pest.
Researchers at Northwestern University found that a damaged fertilized egg sends a molecular signal to the mother that protects her from cellular stress and environmental damage. This allows the mother to live longer and produce healthier eggs.
A recent study found that THC, the psychoactive ingredient in marijuana, impairs female fertility by decreasing embryo development and quality. The research suggests that females exposed to THC have lower rates of viable pregnancies and are more likely to experience infertility.
Researchers developed an octopus-inspired soft robotic arm that can grip a wide range of objects, from eggs to iPhones. The device uses a flexible, tapered design and vacuum-based biomimetic suckers to attach to objects of various shapes and textures.
For the first time, a cancer patient has given birth to a healthy baby using lab-matured eggs that were frozen, thawed, and fertilized five years later. The breakthrough achievement demonstrates the potential of in vitro maturation (IVM) for fertility preservation in cancer patients.
Researchers discovered that dormancy is a natural response to over-predation, allowing zooplankton to survive during food scarcity. Laying dormant eggs can aid population recovery, while regular eggs may not.
A study at the University of Queensland found that a non-invasive treatment can maintain or restore egg quality and alleviate the biggest barrier to pregnancy for older women. The treatment uses a metabolic compound to boost energy levels in cells, which were found to be lower in older female mice.
Elective egg freezing is a common method to increase pregnancy chances at a later age. Patients under 35 with normal ovarian reserve have the best chance of success, but future live births are not guaranteed. The treatment process takes 10-14 days and fees are not covered by Canadian government health insurance.
Researchers have discovered two crucial mechanisms that contribute to the robust orientation of polarized proteins along the long axis of the fertilized egg. The study shows that the ellipsoidal geometry of the egg influences patterning and selection of the long axis polarization.
Scientists investigate three 67 million year old oviraptorid egg fossils, determining that the embryos were at different developmental stages and likely hatched at different times. The findings suggest a unique nesting biology similar to modern birds, challenging previous assumptions about oviraptorids.
Scientists discovered that jumping genes target egg cells with reduced quality for elimination during fetal development, a process called FOA. This mechanism helps maintain the caliber of available egg supply, suggesting potential ways to combat infertility.
Researchers used microeconomic models to analyze the circumstances required for reciprocal egg trading to work. The results reveal that eggs must be costly to produce and it's essential to identify cheaters before mating. This complex system of trading helps hamlets avoid a costly dilemma by dividing the reproductive role.
Leatherback turtle eggs laid in Bocas del Toro nesting beaches contain high concentrations of trace metals, posing a health risk to local communities. The ingestion of these eggs could lead to increased lifetime carcinogenic risk for adults and children.
Researchers found that DEHP disrupts meiosis in worms, leading to defects during egg formation and early embryonic development. The chemical causes excessive DNA breaks and interferes with the system that repairs them, resulting in abnormal chromosomes and reduced embryo viability.
A new study finds that low doses of DEHP impair egg production in roundworms by increasing DNA double-strand breaks and hampering repair systems. This can lead to chromosomal defects and embryonic development problems.
A new study reveals that American coot chicks' bright orange and red feathers are a result of maternal effect, with mothers putting more carotenoid pigments in later eggs. This trait helps parents choose the most colorful chick, which receives preferential feeding and has a higher chance of survival.
Researchers developed equations to study life's diversity and predict specific traits, including reproduction timing and lifespan. The new theory refines old understandings about life history tradeoffs and has implications for ecosystem models and management decisions.
A new study found that female grape berry moths detect a subset of volatile organic compounds emitted by grapes, as well as nearby plants like gray dogwood and apple trees. The researchers suggest that the moths use these common volatiles to find their target habitat before using other cues to locate specific berries.
Research found that introducing peanut and egg early to infants can reduce the risk of developing a food allergy. Despite low adherence to an introduction regime, the study showed that early introduction was effective in preventing food allergies in specific groups of infants.
A parasitic wasp, Idris elba, has been discovered to target the eggs of an invasive stink bug, bagrada bug, which affects cruciferous vegetables. The finding marks a significant step toward developing natural control measures for the pest.
Researchers at Stanford University School of Medicine discovered that the cytoplasm of ruptured Xenopus frog eggs spontaneously reorganizes into cell-like compartments. These compartments divide like real cells, undergoing over 25 rounds of division, and retain the ability to undergo division.
A new study by biologists at the University of Chicago and University of North Carolina reveals how species that form long-term pair-bonds raise their young more efficiently. By investing in love and affection, males stimulate females to work harder, leading to increased reproductive success.
A study of 3000 egg cells reveals that chromosome errors, which increase with age, can lead to infertility and chromosomal syndromes. As women age, the eggs' maturity and fertility decline, with younger girls experiencing more errors during maturation.
A new study found that mosquitoes are more likely to lay eggs in clusters of patches withstanding water, rather than dispersed patterns. This creates hotspots where mosquitoes can breed and transmit diseases like Zika, dengue, and chikungunya.
Scientists successfully edited the genes of albino lizards using CRISPR-Cas9, allowing them to study gene regulation and vision development. The technique, which can be applied to other animals, demonstrates a new approach for manipulating reptile genomes.
New research shows that mosquitoes at the northern edge of their range are successfully surviving cold winters using diapause eggs. This rapid local adaptation could impact efforts to control the spread of invasive species like Asian tiger mosquitoes, which transmit diseases such as Zika and dengue viruses.
Researchers found that turtle embryos move towards warmer ends of eggs and develop into females or males based on the temperature gradient. This study provides a rare 'good news' story about conservation, as it suggests that turtles may be more resilient to climate change than thought.
Researchers found that turtle embryos can move around to find optimal temperatures, influencing their own sex determination. This behavior may help turtles buffer the effects of climate change by producing a balanced sex ratio.
A new study reveals that American robins have a preference for using one eye over the other when looking at decoy eggs, with those who exhibit this bias being more successful at ejecting foreign eggs. This specialized ability is thought to be an adaptation to avoid brood parasites.
U of Guelph researchers found that alligators' hearts become bigger and stronger when exposed to low oxygen during early development, unlike many other animals. This discovery has significant potential to benefit humans, particularly those with weakened hearts.
Researchers have identified a single gene variation responsible for non-male-producing (NMP) trait in Daphnia, a type of planktonic crustacean. The discovery sheds new light on the species' unique reproductive strategies and could lead to innovations in fertility treatment or pest management.