Reproductive Biology
Articles tagged with Reproductive Biology
Placental insufficiency during pregnancy is associated with memory alterations years after childbirth
A study by the Sant Pau Research Institute found that placental insufficiency during pregnancy is associated with higher risk of memory alterations years after childbirth. Women with angiogenic imbalance had a higher frequency of memory problems, even after accounting for other clinical factors.
Researchers identify how enzyme affects infertility and cancer progression
A specific region of Dicer must be activated to achieve proper cell division and reproduction, a discovery that sheds light on the regulation of this enzyme's critical role in both cancer biology and fertility. This finding opens new avenues for studying how small epigenetic changes contribute to disease.
Link between male infertility and increased risk of cancer
Research from Lund University found a link between male infertility and an increased risk of developing colorectal and thyroid cancer. Men who underwent assisted reproduction techniques, such as ICSI, were more likely to develop these cancers.
University of Cincinnati opens state-of-the-art zebrafish research facility to study infertility
The University of Cincinnati has opened a zebrafish research facility to investigate the effects of environmental contaminants on human fertility. The lab will use zebrafish as a model organism to understand molecular mechanisms behind reproductive biology and infertility.
Genetically modified marmosets as a model for human deafness
Researchers have created genetically modified marmosets with a knocked-out OTOF gene, replicating key characteristics of human deafness. The animals developed normally but were deaf from birth, offering a crucial tool for developing new therapies.
The hidden cost of sperm storage: Ejaculates found to deteriorate across the animal kingdom
A study led by Oxford University researchers reveals that sperm stored for extended periods deteriorates quickly, regardless of male age. Regular ejaculation has been shown to improve sperm quality in humans and animals alike.
DHEA regulates chloride homeostasis and sperm motility via the membrane receptor ADGRG2
Research reveals DHEA's role in regulating sperm motility through the Gs–cAMP–PKA signaling pathway. It also modulates reproductive tract ion homeostasis by enhancing ADGRG2–CFTR functional coupling.
Researchers show dinos hatched eggs less efficiently than modern birds
Researchers in Taiwan studied oviraptor incubation patterns, finding that oviraptors used the sun's warmth to hatch eggs, unlike modern birds. This study sheds light on the evolution of avian-style incubation and reveals that oviraptors may not have been as efficient at hatching eggs as modern birds.
Antifibrotic drug shows promise for premature ovarian insufficiency
Researchers found that an approved antifibrotic drug, finerenone, can reduce ovarian fibrosis and promote follicle growth in women with premature ovarian insufficiency. Clinical trials showed that finerenone improved follicle development and mature oocyte quality in women with POI.
Fecal transplants from older mice significantly improve ovarian function and fertility in younger mice
A new study reveals that fecal transplants from older female mice significantly improve ovarian function and fertility in young mice. The transplants show a direct link between the gut microbiome and ovarian health, with potential implications for fertility and overall health as women age.
Rhythm during sex in bonobos provides new insights into the evolution of communication
A new study reveals that the tempo of repetitive movements during bonobo sex is remarkably high, averaging seven movements per second. Facial mimicry plays a crucial role in this behavior, but its impact on the tempo of movements is limited, with a sharp drop in tempo after facial mimicry ceases.
Scientists identify smooth regional trends in fruit fly survival strategies
Researchers found a smooth variation in sensitivity to diapause induction with air temperature and daylight length, suggesting genes regulating circadian rhythm play a key role. The timeless gene was associated with variations in female diapause sensitivity, providing insights into molecular mechanisms behind diapause.
University of Cincinnati study: New treatment guidelines needed for chronic kidney disease patients
A new study from the University of Cincinnati College of Medicine emphasizes the need for updated treatment guidelines on reproductive health among patients with chronic kidney disease (CKD). The survey of 104 nephrologists found that sexual and menstrual health were rarely discussed, highlighting barriers to counseling.
Pennington Biomedical’s Dr. Gang Hu appointed to NIH Reproductive, Perinatal and Pediatric Health Review Group
Dr. Gang Hu, a leading expert in chronic disease epidemiology, has been appointed to the NIH Reproductive, Perinatal and Pediatric Health Review Group. He will evaluate studies on reproductive, perinatal, and pediatric health, with a focus on lifestyle factors and their impact on chronic diseases.
Researchers ‘listen in’ to embryo-mother interactions during implantation using a culture system replicating the womb lining
Scientists have engineered a system replicating the womb lining to investigate embryo-mother interactions during implantation. The new model reveals crucial details about the complex communication between the embryo and endometrium, shedding light on causes of implantation failure and pregnancy complications.
Detailed cell map unlocks secrets of how reproductive organs form
Researchers mapped over half a million individual human cells from the developing reproductive system to identify key genes and signals that drive organ formation. The study provides important insights into conditions affecting the reproductive organs and how environmental chemicals may affect reproductive health.
Contraception and castration increase lifespan in mammals
A comparative study of 117 mammal species found that reproductive suppression increases lifespan by an average of ten percent. The study suggests that blocking reproduction allows more energy to be directed towards longevity, with significant effects observed in various mammalian groups.
Male bonobos track females’ reproductive cycle to maximize mating success
Male bonobos focus their mating efforts on females who have reached maximum swelling and are older, indicating a higher probability of ovulation. This flexible strategy allows them to overcome the unreliable nature of female fertility signals.
Gene delivery via nanotubes changes fish sex to boost aquaculture yield
Researchers have successfully induced sexual reversal in all-female mandarin fish using functionalized Single-Walled Carbon Nanotubes as a delivery vehicle. Key genes amh and amhy were introduced into juvenile fish through an immersion bath, leading to detectable gene expression in the gonads.
In mice, fertility treatments linked to higher mutations than natural conception
A new study on artificial reproductive technologies found that mice conceived with IVF have slightly increased rates of DNA errors compared to those conceived naturally. The researchers discovered a 30% increase in new single-nucleotide variants, which are unlikely to be harmful.
NUS Medicine and CHA University to harness artificial intelligence to tackle male infertility, uncovering new approaches to reverse fertility decline
Researchers from NUS Medicine and CHA University have developed AI-assisted diagnostic tools for male infertility, identifying hidden patterns in clinical data. A novel compound, MIT-001, has been shown to reverse age-related embryo decline by targeting ferroptosis, a form of cell death driven by iron and oxidative stress.
Key mechanism for protecting genetic material during reproduction discovered
A team of scientists at the University of Seville identified a key process protecting DNA integrity in reproductive cells, preventing genetic defects during egg formation. The study found that phosphorylation acts as a 'switch' against DNA damage, allowing the genome to repair itself properly during meiosis.
RSA-KG: A graph-based rag enhanced AI knowledge graph for recurrent spontaneous abortions diagnosis and clinical decision support
A novel graph-enhanced AI framework called RSA-KG was developed to tackle complex, multifactorial cases of recurrent spontaneous abortions. It outperforms existing models by structuring knowledge and enabling multihop reasoning, leading to more accurate diagnoses and treatment plans.
Omega-3 fatty acid DHA shown to relax reproductive tract muscle
Research team from Toho University discovered that docosahexaenoic acid (DHA), a major omega-3 fatty acid, directly relaxes smooth muscle in the male reproductive tract by blocking specific calcium channels. This finding may help explain DHA's broader health benefits and suggest potential new approaches to treating male infertility.
Birds thrive despite pollution from ‘forever’ chemicals
Researchers investigated tree swallow bird groups in the US and found no association between chemical exposure and reproductive health outcomes. Despite high concentrations of forever chemicals in their environment, birds were unaffected by exposure levels, indicating resilience to these pollutants.
The Crop Journal study delivers a near-complete genome map of northern wild rice
Researchers have assembled a near-complete genome map of northern wild rice (Zizania palustris), spanning 1.41 Gb with 47,804 predicted genes. This improved genome provides critical insights into the plant's unique adaptations and traits, supporting future breeding and sustainable cultivation.
Male crickets bulk up, females invest in reproductive organs
In a lab study, researchers found that female crickets prioritize reproductive organ development, while males focus on growing bigger bodies and storing energy. This sex difference in resource allocation is linked to mating success, with females allocating more resources to eggs.
Longer body size means more female calves for baleen whale moms
Researchers tested a popular evolutionary theory by comparing maternal length and fetal sex in over 100,000 whales. They found that the fetal sex ratio skews female for longer body size, suggesting that female calves benefit more from heritable fitness than males do. The findings contradict the Trivers-Willard hypothesis.
More than a reflex: How the spine shapes sex
The study found that a specific spinal circuit is involved in both ejaculation and arousal, and integrates sensory inputs to adjust its output based on the animal's internal state. The researchers also discovered that Gal⁺ neurons receive sensory input from the penis and can trigger ejaculation, but their effects are suppressed by brai...
Making low-fertility rats fertile by changing the treatment interval
Researchers at Osaka Metropolitan University have discovered that delaying fertility drug administration to match follicle maturity period increases ovulated oocytes and normal offspring development. This study contributes to understanding infertility treatments and potential applications for humans and endangered species.
UCLA scientists map primate ovarian reserve development, offering key insights into women’s health
Researchers developed a comprehensive road map of ovarian reserve formation in primates, providing crucial insights into women's health. The study could lead to better treatments for infertility and hormonal disorders like PCOS.
Early puberty and early childbirth may come with a cost
Girls who go through puberty before age 11 have double the risk of type 2 diabetes, heart failure, and obesity, while women who give birth before 21 have quadruple the risk. Later puberty and childbirth are associated with longer lifespan, lower frailty, and reduced disease risk.
Chinese Medical Journal article review explores extracellular vesicles in oocyte health and therapies
Extracellular vesicles play a crucial role in regulating oocyte maturation, follicular growth, and quality. In pathological conditions, EVs can disrupt communication, leading to impaired oocyte development and ovarian failure. Therapeutic EVs show promise in reversing ovarian pathologies by delivering functional molecules.
Space mice babies
A team of researchers at Kyoto University successfully cryopreserved mouse stem cells and sent them to the International Space Station, where they returned healthy offspring after thawing. The study suggests that cryopreservation can maintain fertility for at least six months, paving the way for future human spaceflight.
Pediatric investigation study finds sex-based fetal responses to maternal hypertension
A pediatric investigation study reveals that male fetuses prioritize growth while female fetuses focus on placental development under gestational hypertension. The findings support the growth strategy hypothesis and suggest sex-specific differences in fetal responses to prenatal stressors.
Seeing with fresh eyes: Snails as a system for studying sight restoration
Researchers have established apple snails as a system to study eye regeneration, which may hold the key for restoring vision due to damage and disease. The team discovered that the snail eye is anatomically similar to humans and can regrow itself, with genes such as pax6 playing a crucial role in development.
Pollination behavior has huge role in plant evolution
Researchers studied pollinator-bee interactions in the Amazonvine, finding that temporal overlap affects plant fitness and flower size. Within-season mismatches between plants and pollinators can drive change in plant traits and influence evolutionary outcomes.
The alliance between the immune system and reproduction in mammals
Researchers explore how immune balance affects reproductive success in female mammals, from mating to birth. They find that immune balance is crucial for reproductive success, and that different stages of reproduction require specific immune shifts.
New book explores the impact of antibiotics on women’s reproductive health
The book examines antibiotic-induced reproductive toxicity, microbiome alterations, and emerging concerns around antibiotic resistance. It provides critical insights for clinicians, pharmacists, researchers, and students in reproductive medicine and pharmacology.
Deep learning accelerates research on early pregnancies
Researchers at King Abdullah University of Science and Technology (KAUST) have created a deep learning tool called deepBlastoid to study human embryo development in artificial laboratory conditions. The tool can evaluate images of blastoids equally well as expert scientists but 1000 times faster than traditional methods.
Exploring animal life in the radioactive shadows of Chornobyl and Fukushima
A team of researchers are studying the reproductive traits of Japanese tree frogs living in Fukushima Prefecture, Japan, to understand how radiation affects their survival. Their findings suggest that radiation can disrupt genetic pathways associated with sperm motility, potentially altering reproductive success.
Key epigenetic switch discovered: Loss of LSD1 triggers ovarian reserve depletion and premature failure
A study published in Science Bulletin discovered that histone demethylase LSD1 maintains dormant primordial follicles, which are essential for long-term ovarian function. Loss of LSD1 triggers ovarian reserve depletion and premature failure.
Fertilizable rat sperm produced in a mouse body by blastocyst complementation
Researchers have developed a novel method to generate rats with ES cell traits using blastocyst complementation. This approach eliminates the need for fluorescent labeling and reduces costs compared to conventional techniques.
Microplastics discovered in human reproductive fluids, new study reveals
Researchers detected microplastics in 69% of women's follicular fluid and 55% of men's seminal fluid, with PTFE being the most prevalent polymer. The study highlights the need to explore possible implications for human reproductive health and fertility.
Against the odds: Endometriosis linked to four times higher pregnancy rates than other causes of infertility, new study reveals
A landmark 30-year study of over four million women in England found that women with endometriosis-associated infertility had a four times higher chance of conception compared to those with infertility from other causes. The study also showed that women with endometriosis may retain good reproductive potential, especially if diagnosed ...
Older paternal age linked to higher miscarriage risk and lower live birth rates in donor egg IVF cycles, new study finds
A new international study reveals that male partners over 45 carry significantly increased miscarriage risks and lower live birth rates even when young donor eggs are used. The study found that older paternal age is linked to genetic mutations, sperm DNA fragmentation, and epigenetic changes, impairing embryo development.
Construction of a new synthetic allohexaploid wheat and its potential for wheat improvement
Researchers have successfully synthesized a new allohexaploid wheat, Triticum kiharae, by hybridizing Timopheevii wheat and goat-grass. This approach allows for the simultaneous introgression of genetic variations from wild relatives into common wheat, potentially enhancing its intraspecific genomic diversity.
BGI Genomics launch first localized NIPT project in Armenia with prom-test laboratories
The first localized Non-Invasive Prenatal Testing (NIPT) project in Armenia has been launched by BGI Genomics with Prom-Test Laboratories. The NIFTY test offers screening for Down syndrome, Edwards syndrome, Patau syndrome, and sex chromosome anomalies with over 99% accuracy.
New study links longer reproductive years to healthier brain aging in women
A new study suggests that women who spend more time in their reproductive phase may experience slower brain aging. Estradiol, the most potent form of estrogen during this period, may help protect the brain from age-related decline. However, further research is needed to fully understand the relationship between estradiol and brain health.
Baby on board: Humpback whales give birth while migrating and carry on travelling
Researchers found that humpback whales can give birth in temperate waters along their migration route, with calves born as far south as Tasmania. This challenges the long-held assumption that tropical waters are the only nursery for humpback whales.
Common diabetes drug helps chickens lay more eggs
Researchers at Penn State found that metformin increases fertile egg production, reduces body fat, and improves reproductive hormone levels in broiler breeder hens. The study suggests that metformin can extend the productive lifespan of these chickens, potentially improving animal welfare and efficiency in poultry farming.
Branched-chain amino acids (BCAAs) supplements may harm male bodybuilders' fertility
A new study reveals that BCAA supplements popular with male bodybuilders may impact their fertility, causing changes in sperm concentration and decline in fertility. Valine, a key BCAA, has a powerful effect on male reproductive function.
Inflammation may contribute to female infertility
Researchers found that inflammation in the female reproductive tract can hinder fertility, but replenishing progesterone levels can help. This discovery could improve women's chances of becoming pregnant and save more pregnancies.
Scientists film the heart forming in 3D earlier than ever before
Researchers at UCL and the Francis Crick Institute have identified the origin of cardiac cells using 3D images of a heart forming in real-time. They found that cardiac cells emerge rapidly during gastrulation and follow distinct paths to form the heart's pumping chambers and atria.
Higher success rate using a simple oral swab test before IVF
A new study found that a simple oral swab test can increase IVF success rates by identifying the best hormone treatment for each woman based on her genetic profile. The test, developed by researchers at Lund University, shows promise in reducing costs and increasing pregnancies.
Phosphate levels in blood strongly affect sperm quality in men
Research shows that low phosphate levels in blood are associated with reduced sperm motility and poor semen quality. The findings suggest a potential link between phosphate and male fertility, highlighting the importance of understanding biological factors involved in reproductive health.
A healthy diet in childhood is linked to starting menstrual periods later, regardless of BMI or height
A study published in Human Reproduction found that healthy childhood diets are associated with delayed onset of menstruation, independent of body mass index (BMI) or height. The research suggests that a diet high in fruits, vegetables, and whole grains may help reduce the risk of chronic diseases such as diabetes and breast cancer.
UTA-backed research tackles health challenges across ages
Researchers at UT Arlington's CIHI are developing innovative solutions to address complex health needs in children with disabilities, behavioral health issues, and medical conditions. The projects aim to improve healthcare services, enhance quality of life, and promote healthier aging through cutting-edge research and model organisms.
One of the most widely used fungicides in farming harmful to reproduction in birds
A French study found that chronic exposure to the fungicide tebuconazole impairs offspring growth and survival in farmland birds. Sparrow chicks exposed to realistic concentrations of tebuconazole showed reduced growth and doubled mortality rates, particularly females.