Articles tagged with Reproductive Biology
Researchers at the University of Adelaide used quantum-sensitive cameras to image embryos, capturing biological processes in their natural state. The sensitive detection of photons allows for gentle illumination and minimizes damage from light, enabling researchers to study live cells and developing specimens.
A new study has focused on the safety of outdoor swimming during pregnancy, revealing large gaps in knowledge and highlighting the need for further research. Expert-led recommendations have been provided for pregnant people, including advice to only swim in cold water if a regular cold water swimmer before pregnancy.
The University of Texas MD Anderson Cancer Center received nearly $23 million in CPRIT funding to advance cancer research, translational science, and clinical trials. The funding will support the recruitment of a first-time tenure-track faculty member and enhance the understanding of cancer biology.
The Antarctic midge employs a unique survival mechanism by undergoing quiescence in its first year and obligate diapause in its second. This adaptation allows the insect to quickly resume development when temperatures rise.
Research reveals that normal term birth triggers a cellular process involving glutamine metabolism in neural stem cells, which is impaired by preterm birth. This process affects postnatal neurogenesis and may contribute to worse neurodevelopmental outcomes in preterm infants.
According to UTHealth Houston research, adolescent and young adult men with cancer have a slightly elevated risk of having preterm birth and children with low birth weight. However, the likelihood of live birth was highest for fathers who had thyroid cancer and lowest for those with gastrointestinal cancer.
Researchers used drone imagery to measure calf growth and maternal body condition in Hawaiʻi and Alaska, finding larger females produced larger calves. Humpback whales lose significant weight during lactation, with mothers losing nearly 214 pounds per day.
Researchers investigated genetically modified rice's impact on seed production, revealing excessive sugar accumulation hinders pollen fertility and seed-setting. The study highlights the need for balance in photosynthesis to ensure sustainable rice cultivation.
Three Texas A&M biologists have received NIH Maximizing Investigators’ Research Awards to support their research on type IV pili, darter fish social behaviors and bacteriophages. Drs Koch, Moran and Ramsey will explore bacterial behavior, genetic mechanisms and neural basis of paternal care in fish.
Drones offer a hands-off option for surveying raptor nests, providing an efficient and safer alternative to traditional methods. Researchers found minimal impact on raptors and higher safety for both humans and birds compared to approaching nests by foot.
Researchers found that pregnant women experiencing life stress, anxiety, depression, or PTSD had distinct oral microbiomes. These microbe communities showed high alpha diversity in those with anxiety and depression, while post-traumatic stress disorder symptoms were linked to high beta diversity.
A long-term study found that warmer winters driven by climate change reduce the number of offspring raised annually by the federally threatened Florida scrub-jay by 25% since 1981. This is due to snakes becoming a primary nest predator in warmer weather, leading to increased reproductive effort but lower success rates.
A team of scientists has pinpointed a critical neural circuit for female sexual rejection, revealing how the brain integrates signals to shape behavior. The ventromedial hypothalamus, specifically progesterone-sensitive neurons in the anterior VMH, play a crucial role in determining whether a female accepts or rejects mating attempts.
Researchers at Osaka Metropolitan University found that suppression of Pcdh8 is essential for proper notochord elongation in zebrafish embryos. This study may lead to novel tumor therapies in humans due to the gene's role in controlling cell proliferation.
Researchers at Niigata University successfully generated rat offspring from ovarian oocytes transplanted into mice, overcame previous challenges in producing fertilized eggs and embryos.
Researchers found that stress responses can spread to unexposed group members, altering their activity levels and social behaviors. This impact on social cohesion could have profound effects on the fitness of individual members and the dynamics of groups.
The Wyss Institute's iNodes team has been awarded an ARPA-H Sprint for Women's Health to develop implantable immune organs for treating ovarian cancer. The iNodes concept is based on the formation of lymphoid organs in tumors, which can be reprogrammed to attack cancer cells and retain a long-term immune memory.
A new study led by Arizona State University researcher Michael Lynch explores the substantial energy demands required to maintain and evolve multicellular life. Multicellular organisms require a tenfold increase in energy compared to protists, highlighting how respiration and metabolic processes are crucial for advanced life forms.
Researchers from China, UK, and US formed the World Urine Project to explore urine's potential as an early warning system for diseases. The initiative establishes a shared database for accurate and personalized diagnosis, aiming to transform reactive medicine.
Researchers at Kumamoto University have achieved a groundbreaking advancement in stem cell biology by reproducing the developmental process of hematopoietic stem cells in vitro. This culture system enhances our understanding of HSC development and has the potential to be instrumental in stem cell therapy and blood disease treatments.
Researchers at Karolinska Institutet have mapped how microRNAs control cell development in the human embryo during the first days after fertilization. The atlas identifies crucial sncRNAs that guide embryonic growth and differentiation, shedding light on how to identify healthy embryos for improved fertility treatment.
Dragonfly species with darker wing coloration have evolved to tolerate higher temperatures, possibly a decisive advantage in a warming world. This finding could help predict which species are vulnerable to extinction and preserve biodiversity.
Researchers studied urinary proteome of male rats before and after mating, finding nearly two-thirds of differential proteins related to spermatogenesis. The study suggests urine proteome has potential as non-invasive diagnostic method for abnormal spermatogenesis.
New research has identified four genes with a strong impact on menopause timing, which are also linked to an increased risk of cancer. The study found that women with only one working copy of these genes experience premature menopause, leading to a faster reproductive lifespan.
A Danish study reveals that only children and those with half- or step-siblings enter puberty significantly earlier than children with biological siblings. The study found a two-month difference in girls' pubertal timing and a smaller but still significant gap for boys.
The atlas contains data for around 626,000 cells from 121 people, including individuals with and without endometriosis. Researchers found two types of immune cells and two types of stromal cells potentially involved in endometriosis, highlighting new avenues for future research.
A recent study found that Chinese patients with ovarian cancer often carry a specific variant of the RAD51D gene, which can promote tumor growth. The variant also makes these patients more sensitive to PARP inhibitors, leading to a favorable prognosis and potential new treatment methods.
A team of biologists has discovered a unique breeding behavior in the Andamanese Charles Darwin's frog, laying terrestrial eggs inside tree holes in an upside-down position. The frog also produces complex advertisement calls and engages in aggressive fights for mating rights.
A straightforward and adaptable method for tubulin/cilia staining has been developed in ciliates, offering four significant advantages in cytoskeleton research, morphology studies, taxonomy, and ecological studies. The new method enables seamless integration with immunofluorescence staining and confocal microscopy.
Researchers found that fish species on Trinidad Island adapt their egg-laying habits in response to predators, showing evolutionary plasticity. The study provides new insights into how aquatic organisms adapt to environmental changes, including those caused by climate change.
A national, register-based study of 68,738 women in Denmark reveals significant social disparities in achieving live births after assisted reproductive technology (ART) treatment. Women with higher education levels and income had a greater likelihood of success.
The UK has released a pioneering Code of Practice for the use of stem cell-based embryo models in research, providing standards for rigorous ethics and maximizing benefits. The code sets out processes for decision-making in research using these models, allowing scientists to proceed confidently while maintaining public trust.
In planarian flatworms, biogenic monoamines play a critical role in regulating female and male germ cells. Researchers discovered that these molecules form a novel signaling pathway controlling planarian germ cells, producing the 'BATT Signal' to regulate reproductive development. The study highlights the importance of monoamine conjug...
Adult fish mucus has been found to possess immunomodulatory properties, similar to those of mammalian milk, which can help regulate the immune response in larvae and promote a balanced microbiota. This discovery may lead to new strategies for enhancing the survival rate of fish in aquaculture
Researchers at Dartmouth College found that fruit fly oocytes can renew chromosome-linking proteins, potentially helping older women reduce pregnancy complications. The discovery could lead to new therapeutic strategies for enhancing protein rejuvenation in human eggs.
A study published in Science Advances reveals that germ cells drive sex-dependent lifespan differences in vertebrate animals. Removing these cells led to similar lifespans in males and females of the turquoise killifish species. Vitamin D was also discovered to have a role in improving longevity, with supplementation extending life spans.
Higher cortisol levels in the womb may lower a boy's IQ score at age 7, while higher urine cortisone levels may improve a girl's IQ score. Research suggests that prenatal exposure to cortisol affects cognitive function in children independently of sex.
Researchers Polina A. Loseva and Vadim N. Gladyshev challenge the existing definition of human life, suggesting a new meaning for the 14-day stage in organismal life grounded in recent mechanistic advances and insights from aging studies. This stage defines the separation of soma from the germline and marks the boundary between rejuven...
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.
Researchers at INRAE discovered that female sex pheromones can remotely modulate the circadian rhythm of males in the African cotton moth, Spodoptera littoralis. This finding paves the way for exploring biocontrol methods targeting the pest.
A new study reveals insights into the human ovary's factors that enable follicles to mature, enabling potential treatments for ovarian hormone production restoration and fertility. The atlas may lead to the creation of artificial ovaries in labs using stored tissue, providing a longer fertility window for patients.
A recent study suggests that global natural vegetations commonly match with their ecotopes, influenced by varying climate. Drastic fluctuations of temperature and precipitation may result in remarkable conversions among natural vegetations, especially in northern latitudes and high elevations.
A new study led by Karolinska Institutet reveals the mechanism of sperm entry into the egg, explaining how mutations in egg coat proteins cause female infertility. The research also suggests potential implications for non-hormonal contraceptives.
Researchers found associations between prenatal vitamin and metal exposures and epigenetic aging biomarkers in early life. A one standard deviation increase in essential metals was associated with lower Horvath EAA at birth, while arsenic was linked to greater EAA at birth and in childhood.
Researchers have made groundbreaking discoveries about the reproduction of giant Antarctic sea spiders, a phenomenon known as polar gigantism. The study found that these creatures do not carry their young like most other species, but instead attach them to rocks for several months before hatching.
Researchers at Karolinska Institutet discovered that fibroblasts mediate erection by taking up noradrenaline, widening blood vessels, and increasing the number of cells in response to frequent erections. This knowledge may lead to new treatments for erectile dysfunction.
A study of 379 animal studies found no consistent impact of aging on ejaculate traits, contradicting the human trend. In some species, age even improved reproductive traits, such as larger ejaculates and increased sperm viability.
Researchers from Osaka University and University of Hawaii found that environmental microorganisms boost fruit fly reproduction by modifying hormone levels and increasing the production of germline stem cells. This discovery could lead to new avenues for improving reproductive health and fertility treatments.
Scientists at Niigata University successfully produced marmoset eggs and embryos from xenotransplanted ovaries, offering a new method for generating genetically modified marmosets. The novel egg production system is expected to facilitate research into human diseases and contribute to regenerative medicine.
Researchers developed a mathematical model that accurately predicts gastrulation flows in chick embryos, which are similar to human embryos. The model then predicted cellular flows observed in frog and fish embryos, suggesting common physical principles behind multicellular self-organization across vertebrate species.
Researchers have discovered that the waxy protective barrier around plants plays a role in sending chemical signals to other plants and insects. This discovery might eventually be harnessed to develop stronger plants that can deal with challenging environmental conditions.
A new study found that the progeny of successive generations of old parents had significantly shorter lifespans than those from young parents in both Drosophila melanogaster and Caenorhabditis elegans. The researchers also discovered that switching to only one generation of younger parents improved the healthspan of the offspring.
Researchers at Johannes Gutenberg University Mainz discovered a unique cryptochrome protein in marine bristle worms that distinguishes between sunlight and moonlight. The protein's structure reveals an unusual light-induced change from dimer to monomer arrangements, allowing it to synchronize reproduction with lunar phases.
Researchers found that mothers increase egg size when they have more female helpers to feed their chicks. The study suggests that helpers allow mothers to invest more in offspring at the egg stage by lightening maternal workloads at the chick-feeding stage.
Research by the University of Bern reveals that poison dart frog personality traits impact mating success, clutch numbers, and offspring survival. These traits are present in tadpoles and remain stable after metamorphosis.
Researchers created an immunodeficient mouse model of physiological ovarian aging, mirroring female fertility decline with age. The study found decreased oocyte quality, impaired follicle activation and growth, and increased mitochondrial dysfunctions in Old mice.
Researchers investigated ciliate conjugation in Paramecium jenningsi, uncovering a 48-hour process with three prezygotic and postzygotic divisions. The study provides new insights into nuclear selection and differentiation during meiosis.
A new versatile platform controls peptide hormones in fish, revealing surprising findings about conserved genetic networks and adaptable hormone regulation. This innovative method holds promise for transforming fish farming practices and exploring ways to prolong vertebrate lifespan.
Researchers discover biological mechanisms by which Wolbachia bacteria boost fruit fly fertility, with implications for controlling disease-spreading mosquitoes. The study reveals that Wolbachia infection restores fertility in flies with defects, enabling them to produce more offspring.
A recent analysis found that assisted reproductive technology cycles using a gestational carrier resulted in higher live birth rates and an increased risk of twins. Despite national recommendations, more than one-quarter of embryo transfers involved two or more embryos, highlighting the need for improved guidelines.