Articles tagged with Eggs
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In cooperatively breeding species, females tend to produce smaller eggs when help with rearing offspring is at hand. This reduction in egg size allows breeding females to conserve energy and increase their chances of survival to the next year or having the next set of offspring sooner.
A University of Guelph study reveals that monarch butterfly eggs are more abundant on milkweed grown in agricultural areas, with three and a half times the number found in urban gardens, natural areas, and roadsides. This finding suggests that roadside planting may not be an effective conservation strategy for this endangered species.
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.
A growing number of non-resident patients are seeking in vitro fertilization (IVF) treatment in the US, with a significant increase in egg donation and gestational carrier use. The study highlights challenges in accessing high-quality ART care, particularly for patients from countries with restricted payment for egg donors.
Researchers have successfully tested a pre-industrial laboratory scale method using microorganisms as natural antagonists to eliminate up to 99.6% of germs from hatching eggs. The bacteria producing pyrazines demonstrated efficiency comparable to that of formaldehyde fumigation.
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.
Researchers have found that ovarian stem cells in mammals play a crucial role in egg production, with potential applications for fertility treatments. The study's findings also suggest that these stem cells may be able to delay the onset of menopause by repairing their 'house' rather than increasing their numbers.
A study found that 7% of healthy Santa Barbara residents tested positive for raccoon roundworm antibodies, highlighting a previously undetected human infection risk. The parasite can survive over a year in the environment and cause severe health effects, including blindness or brain damage.
The researcher will use historic resting eggs of Daphnia retrieved from Wisconsin lakes to observe the process as it transpired in nature. The project aims to determine if behavioral plasticity promotes or impedes adaptation, providing insights into how organisms adapt to environmental changes.
A new study by Oregon State University researchers found that American bullfrog embryos can learn about predators while still in the egg, developing faster and hiding more when exposed to predator signals. This allows them to avoid becoming vulnerable prey, making it harder to control their spread.
A higher number of eggs retrieved in IVF treatment is linked to more chromosomally normal embryos available for transfer. The benefit of a greater oocyte yield decreases with advancing female age.
Research analyzing over 49,000 bird eggs reveals that unique flight adaptations drive variations in egg shape. The study found a correlation between egg shape and hand-wing index, indicating flight efficiency, contradicting previous theories on life history and nesting habits.
A study reveals that birds' flight ability influences egg shape, with more asymmetric and elliptical eggs found in better fliers. The researchers propose that the stretchy egg membrane is responsible for generating diversity in egg shapes.
Researchers found that egg shape varies smoothly across species and is determined by membrane properties rather than shell. A strong correlation links birds with elliptical and asymmetric eggs to high flight ability, revealing adaptations for flight may have driven egg-shape variety in birds.
A new Swansea University study suggests that rising temperatures associated with climate change could drive sea turtle populations to extinction. The research found that warmer incubation temperatures can lead to higher numbers of female sea turtles and increased nest failure, threatening the long-term survival of certain species.
A recent study published in Pediatrics reveals that eggs can be an effective way to promote healthy growth and development in young children. The study found that eggs increased standardized length-for-age score and weight-for-age score, while also reducing prevalence of stunting by 47 percent.
A new tool enables identification of high-end caviar from Beluga sturgeons by analyzing DNA from a single caviar egg, contributing to conservation and fair international trade. The development helps distinguish Beluga caviar from Bester and other species using targeted genetic variants.
A 10-year, $2.7 million project in Ontario reduced turtle deaths on a causeway by 89%, offering global lessons for protecting endangered species. The initiative included fencing, culverts, and public awareness campaigns to reduce roadkill, with significant success.
A study by Drexel University researchers found that erythritol, an artificial sweetener, can halt egg production and kill larvae in flies, making it a potential insect control method. The compound was tested on fruit flies and showed significant reduction in egg-laying and larval survival.
Researchers have identified a key process that contributes to chromosomal abnormalities and miscarriages in older women, offering new hope for improving fertility treatments. The discovery focuses on the regulation of securin levels in egg development, which can help prevent chromosomal abnormalities.
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.
A team of researchers has discovered that parasitic fig wasps use odour sensors to find their host larvae within the fruit. The study, published in Journal of Experimental Biology, found that the wasp's ovipositor can detect carbon dioxide and other gases emitted by developing larvae.
A commentary and editorial in Reproductive BioMedicine Online argue that a registry of egg donors is needed to monitor long-term health risks, citing five case histories of women who developed breast cancer after donation. The authors highlight the lack of data on this topic and call for increased transparency about potential risks.
A periodic time-delayed model of Lyme disease predicts its spread in North America and Canada, incorporating seasonality and climate factors. The model suggests that reducing tick recruitment rates can help eliminate the disease.
Scientists at UC Riverside's Akbari lab have successfully created a strain of red-eyed mutant wasps using CRISPR gene-slicing technology. The goal is to better understand the biology of wasps and other insects to control pests that destroy crops or spread diseases like malaria.
Researchers at University of Montreal Hospital Research Centre discovered a defect in eggs of older mice, causing errors in chromosome segregation. This may also be found in human eggs, contributing to age-related infertility and increased risk of miscarriage.
Researchers observed glassfrogs sitting on their eggs for up to five hours after laying them, absorbing water and hydrating the jelly-coated embryos. The study found that every species of glassfrog cares for its eggs, with mothers tending to theirs immediately after laying and fathers taking over later.
Biologists observed nighttime parental behavior in 40 species of glassfrogs, finding that mothers typically provide minimal care, while fathers take on more extensive roles. This surprising diversity challenges previous assumptions about sex role evolution.
Researchers have found a gene mutation that may contribute to unexplained female infertility, affecting DNA methylation and embryonic development. Women carrying the mutation are healthy but may experience recurrent pregnancy loss or developmental disabilities.
Researchers discovered that spotted-wing flies use senses of smell, touch, and taste to choose ideal nursery sites. They prefer firm texture and volatile chemicals emitted by freshly ripened fruits.
Researchers at Michigan State University are studying the effect of hormones on ovulation and reproduction in cows to develop better fertility treatments for women. The study aims to improve fertility response rates by understanding how increased doses of fertility hormone impact ovarian function and egg quality.
Researchers have discovered a new class of compounds that kill adult and egg stages of the human whipworm, a parasite infecting 500 million people. These compounds could lead to effective treatments and vaccines for whipworm infections, which cause physical and mental damage.
A team of scientists at UC Riverside has identified five major microRNA expression peaks in the Aedes aegypti fat body following a blood meal. By disrupting these miRNAs, researchers hope to control mosquito reproduction and prevent the spread of diseases transmitted by these mosquitoes. The study provides insight into the regulatory g...
Researchers used 'resurrection ecology' to revive and study Daphnia, a freshwater crustacean. They found that sensitivity to copper and cadmium increased as heavy metal levels rose in lakes, challenging evolutionary theory.
A 250 million-year-old fossil from China shows an embryo inside its mother, revealing the first evidence of live birth in a group previously thought to lay eggs exclusively. The discovery, made by an international team of scientists, pushes back the evidence of reproductive biology in this group by 50 million years.
A new model estimates the number of eggs a woman should freeze based on her age and family-building goals, providing data-driven guidance for women considering elective egg freezing. The model considers maternal age by individual year and incorporates the likelihood of embryo development to result in a live birth.
Research published in Occupational & Environmental Medicine found that physically demanding jobs and shiftwork are associated with poorer egg quality and lower fertility rates in women. Women working in heavy-lifting jobs or evening/night shifts had fewer mature eggs, representing a nearly 9% reduction in total reserve of eggs.
A Harvard study found that heavy lifting and non-daytime work schedules can decrease fertility in women, especially those who are overweight or over 37. The researchers measured biomarkers of fecundity in nearly 500 women seeking infertility treatment, revealing an inverse association between physical demands and egg yields.
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.
Research on dinosaur embryos shows that non-avian dinosaurs took 3-6 months to hatch, similar to reptiles. This finding suggests prolonged incubation may have affected their ability to compete with rapidly evolving bird populations, contributing to the mass extinction event.
Researchers have developed a non-destructive imaging technique to accurately determine the sex of baby chickens within four days of hatching, promising to reduce animal welfare concerns. The technique uses optical spectroscopy to identify gender-specific biochemical differences in embryonic blood, with an accuracy rate of 93%.
Researchers have developed a new model to predict the survival of fish embryos in high temperatures, taking into account the relationship between egg size and water flow. The study found that larger eggs require more oxygen and can survive in slower-flowing waters, but this relationship is not always consistent with laboratory results.
A new study published in Nature provides key insights into mitochondrial replacement therapy, a gene-therapy technique that aims to prevent the transmission of harmful mitochondrial gene mutations from mothers to their children. By selecting egg donors with compatible haplotypes, clinicians may achieve higher success rates for producin...
Researchers found extreme variation in shorebird parents' nesting attendance patterns, often defying the 24-hour day-night cycle. The key underlying this variation is not starvation but rather the risk of predation.
Researchers at OHSU and Salk Institute develop a new method to transmit a mother's genetic material into donor eggs, potentially increasing the success rate of infertility treatments. The technique could benefit women of advanced maternal age and those with mitochondrial mutations.
In a study by University of Leicester researchers, male stickleback fish change the design of their nests depending on oxygen content, while females also adjust their nest preferences accordingly. This flexibility might give sticklebacks an advantage in rapidly changing environments.
A new study found that common cuckoo eggs experience similar amounts of decalcification during embryonic development as warbler eggs, maintaining thicker shells. This adaptation helps ease hatching and reduces the risk of host bird puncture.
Researchers explore why human oocytes frequently have abnormal numbers of chromosomes, which can cause genetic disorders such as Down syndrome. Studies found that age-related deterioration of chromosome structure contributes to these errors.
Australian and Belgian medical scientists have discovered a way to improve fertility treatment without the need for hormone drugs, enhancing IVM to increase embryo yield by 50% while reducing discomfort and cost. The new technique aims to restore natural egg maturation processes using potent growth factors.
Researchers found that BPA affects male turtle brains, inducing female-like behavior and altering navigational abilities. This could lead to dramatic population declines in painted turtles, making them a potential indicator species for ecosystem health.
Researchers found that zebra finch eggs exposed to recorded incubation calls weighed less and had lower oxidative damage upon hatching. This reduced mass correlated with improved health at high temperatures, leading to increased fledgling production in the first breeding season.
A new CU Boulder study found that differences in mate-choice decisions among closely related populations can lead to the evolution of different physical traits. Barn swallow males with altered breast feathers and streamer length were more successful in reproduction, suggesting that females play a crucial role in speciation.
Research reveals that brief exposures to low concentrations of crude oil can cause deadly deformities in developing haddock. The study found that haddock eggs are particularly vulnerable to oil compounds, leading to extreme craniofacial deformities and compromising their survival.
A new Northwestern Medicine study finds that ovarian environment changes with age, leading to decreased egg quality and fertility issues. Fibrotic and inflamed ovaries are identified as key factors contributing to this decline.
Scientists found that butterflies have an innate preference for specific leaf shapes and can learn to overcome this preference through experience. This learning ability promotes the evolution of plant biodiversity by favoring rare leaf shapes.
Some frog species have moved to land to secure mating opportunities away from rival males. This strategy allows males to protect their genetic legacy, as found in tropical frog species that hide while breeding.
Researchers discovered that some frog species hide eggs on land to reduce competition from other males, leading to smaller testes in males with terrestrial reproductive modes. This finding sheds light on evolutionary forces driving diversity and provides insights for conservationists.
Researchers found that blue tit males feed their partners more frequently when they are younger and less experienced, but less often when temperatures rise. This helps the females forage for food without interrupting incubation.
Researchers found that commercial formulations of entomopathogenic fungus Metarhizium brunneum and Beauveria bassiana were effective in reducing house fly and stable fly egg-laying. The most effective product, Met52 EC, reduced oviposition by more than half and inhibited house fly development.
Red-eyed treefrog embryos, thought to be helpless, are found to have evolved a quick-release mechanism to escape the egg prematurely. The study reveals that tadpoles can hatch up to two days ahead of schedule and use enzymes to create a hole in the egg membrane before escaping.