Articles tagged with Human Reproduction
Researchers found that ibuprofen modified hormonal profiles through selective transcriptional repression of testicular endocrine cells, leading to a state of compensated hypogonadism. The study used testis explants and human steroidogenic cell lines to investigate the effects of ibuprofen on testicular health.
A study by Instituto Gulbenkian de Ciencia found that worldwide peaks of sexual interest coincide with specific religious celebrations, leading to peaks in birth rates. Online searches related to sex display a cyclical nature that correlates with a specific "loving mood" independently detected on Twitter.
Recent study reveals directional selection on height, age at first birth, and body mass index in males, while stabilizing selection is detected for several traits in older adults. The findings shed light on the ongoing forces shaping human evolution.
A new study by Lancaster University reveals that marginalized groups are often excluded from fertility data due to biases in survey design and sampling. This exclusion can lead to unequal access to reproductive healthcare and misguided policies.
A recent study published in Human Reproduction found that underweight women are at a greater risk of experiencing an early menopause compared to lean or normal weight women. Women who were underweight as teenagers or in their mid-30s had a significant increase in the risk of early menopause, with some women reporting a 50% higher risk.
Significant declines in sperm counts among men in Western countries are alarming, with a 52% fall between 1973 and 2011. The research highlights the need for further investigation into the causes of these trends, which may be linked to exposure to endocrine-disrupting chemicals.
The researcher is studying calcium channels in gonadotropes to understand their role in reproductive disease. This knowledge can lead to the development of new treatments for infertility, tumor growth, and other disorders.
Researchers propose that naked mole-rats' exceptional longevity is due to slowing individual development, resulting in a longer youth period and decelerated aging. Similarly, human data suggests a similar slowdown in the 'Master Biological Clock', leading to increased lifespan and prolonged youth.
Researchers validated 70 genes associated with congenital heart disease in fruit flies, including those modifying histone structure. This approach may enable precise gene-editing techniques for tailored treatments.
A Johns Hopkins Medicine study found that social ecology influences on personal experiences and interactions with family, peers, and healthcare providers hinder young men's use of sexual and reproductive health care. Long wait times, costs, and concerns about privacy also deter seeking care.
A new study reveals that pubertal timing has a significant impact on male reproductive health, with early or late onset associated with poorer semen quality and smaller testicles. The study also found links between pubertal timing and obesity, cardiovascular disease, and sexually transmitted diseases.
A study of African elephants found that mothers and grandmothers provide significant reproductive and survival benefits to their daughters and grandchildren. Grandmothers' social knowledge and environmental conditions significantly impact calf survival, while early birth years and maternal age also play a role in determining reproducti...
A new analysis explores the possibility of in vitro gametogenesis for human reproduction, allowing same-sex couples to have biologically related children. The procedure could also enable 'perfecting reproduction' by making prenatal selection easier and more robust.
The International Federation of Gynecology and Obstetrics calls for increased efforts to prevent exposure to toxic chemicals, linked to reproductive issues such as miscarriage, stillbirth, and cancer. The group advocates for policies to protect patients and communities from involuntary chemical exposure.
The Society of Obstetricians and Gynaecologists of Canada has selected Elsevier to publish its journal JOGC, a leading peer-reviewed publication on obstetrics and gynaecology. The partnership aims to improve the journal's content and services for its members and the wider medical community.
A systematic review of 65 studies in 34 countries identifies 7 areas of mistreatment and abuse during childbirth, including physical, sexual, and verbal abuse. The authors call for improved access to privacy, resources, and trained staff to reduce morbidity and mortality.
Research by Carnegie Institution scientists links steroid hormone ecdysone with fat accumulation and egg development in fruit flies. The findings suggest that increased stored body fat and sugars support healthy oocyte production and fertility.
The Tenth Annual Meeting of the International Conference on Genomics will focus on breakthroughs and advancements in 'omics' research transforming scientific discoveries into better health. Confirmed plenary speakers include prominent figures in the field, highlighting the most influential topics and practical applications.
Researchers identified four promising approaches to prevent intimate partner violence and sexual violence among adolescents, including school-based interventions, psychological support interventions, community-based interventions, and parenting interventions. These strategies show promise in preventing violence in high-income countries...
A recent review of over 150 peer-reviewed studies suggests that exposure to chemicals released during natural gas extraction operations may be harmful to human health, particularly reproductive and developmental health. The review found evidence of adverse effects on fertility, miscarriage, birth defects, and semen quality in humans.
Evolutionary biologist Steven Ramm explores sperm competition as a key driver of reproductive system evolution, highlighting the diversity of sperm cells and their adaptations to compete for fertilization. This research could inform genetic modification to increase fertility in endangered species.
A new study advocates for investing in the sexual and reproductive health of 10 to 14 year olds, a critical period of transition from childhood to adulthood. Researchers recommend tailored programs to meet their unique needs, including parental and guardian involvement, and preventive services to prevent misinformation and promote heal...
Recent research in biological anthropology explores how global environmental variations shape human health and biology. The studies examine the effects of diet, energy dynamics, and chronic inflammation on human reproduction, nutrition, and disease prevalence.
Georgia Regents University has joined the Cooperative Multicenter Reproductive Medicine Network to conduct large-scale clinical trials on male and female infertility. The network aims to develop novel diagnostic and treatment strategies for complex reproductive health issues, including polycystic ovary syndrome and delayed puberty.
The latest themed issue of Reproductive Health Matters explores a new development paradigm to prioritize health, ensuring equitable care for all. The issue critiques the Millennium Development Goals model and advocates for a human rights approach to addressing health disparities.
Researchers found that BPA exposure can dramatically inhibit egg maturation, leading to decreased maturity, increased degeneration, and spontaneous activation. This study adds to growing evidence about the impact of BPA on human health and may explain why some couples struggle with infertility.
A study led by Michelle Hindin identified research priorities for adolescent sexual and reproductive health in low- and middle-income countries. The top-ranking research questions suggest that definitions of problems and interventions need improvement, with a shift towards scaling up existing interventions and developing new ones.
The latest issue of Reproductive Health Matters exposes the significant impact of neglected sexual and reproductive morbidities on women, men, and families globally. It addresses various health issues, including fistula complications, maternal health, and cervical cancer, while also highlighting prevailing myths and misconceptions.
A French study of over 26,600 men found a significant decline in semen concentration and quality between 1989 and 2005. The researchers reported a 32.2% decrease in semen concentration and a 33.4% decrease in the percentage of normally formed sperm.
A new study reveals that only four percent of young women with cancer preserve their fertility during treatments. Women from specific socio-demographic groups are more likely to receive counseling and take action.
A cash transfer programme reduced HIV and HSV-2 infection prevalence by two-thirds in school-age girls, supporting changes in self-reported sexual behaviour. The intervention also showed no significant difference for individuals who dropped out of school.
Researchers have determined the three-dimensional structure of endomannosidase, an enzyme used by devastating human viruses like HIV and Hepatitis C to replicate. This breakthrough opens the door to developing inhibitors that block both pathways used by these viruses.
A new paper finds that emphasis on quick impact interventions has diverted resources away from the neediest patients, with the poorest people seeing little progress. The study highlights the need for medium-term and long-term strategies to achieve inclusive and equitable progress in global reproductive health.
Researchers at University of Pennsylvania School of Medicine found that disrupting the circadian rhythms of fruit flies by feeding them at incorrect times led to reduced fertility. The study suggests a connection between diet and reproduction, highlighting the importance of timing in maintaining reproductive capacity.
Researchers at the University of Copenhagen found a positive correlation between serum vitamin D levels and sperm motility in healthy men. Laboratory stimulation with activated vitamin D also increased forward movement of human spermatooza, sparking new hypotheses about the role of vitamin D in male reproduction.
A study published in BMC's Reproductive Health journal found that a pill containing essential oils significantly reduced premenstrual syndrome (PMS) symptoms. Women taking the supplement reported eased PMS symptoms at 3 and 6 months, with few adverse events recorded.
The article presents a set of 10 guiding principles for health systems strengthening developed from a comprehensive review of the literature and consultation with experts. These principles aim to establish a common foundation for future discussions and strategies in global health systems strengthening.
The European Society of Human Reproduction and Embryology has published a comprehensive English-language textbook for paramedics in reproductive medicine. The book provides an overview of key issues, including evidence-based protocols and research, to support the development of care in reproductive health.
A study by Human Assisted Reproduction Ireland found that there is negligible risk of seroconversion in ART patients, making repeat viral screening unjustifiable. This could result in significant financial costs for couples undergoing treatment.
The article explores issues related to cosmetic surgery, body image, and sexuality, highlighting the lack of proper information on risks and complications. It also examines the controversy surrounding the use of resources for these procedures, particularly in developing countries.
A €2.75 million programme aims to tackle cultural barriers hindering adolescent reproductive health services in Africa. The initiative will analyse current provision and develop targeted interventions to enhance reach and effectiveness.
Two research teams from McGill University Health Centre and McGill University will analyze the effects of brominated flame retardants and phthalates on human reproduction. The five-year study aims to understand the mechanisms underlying these substances' toxicity and their potential impact on future generations.
Endometriosis affects an estimated 1 in 10 women during their reproductive years, causing severe symptoms, infertility, and chronic pain. The EndoCost study aims to assess the societal costs of endometriosis and identify areas for improvement.
The new issue of Reproductive Health Matters highlights the need for comprehensive efforts to strengthen public health systems and create a well-trained workforce. Mid-level providers are willing to take on increased workloads, raising questions about quality of care and financial remuneration.
A new study finds that low-income conflict-affected countries such as Afghanistan and Somalia receive significantly less aid for reproductive health compared to non-conflict-affected countries. The researchers found that an average of just $509.3m (2.4%) was allocated to reproductive health out of a total of $20.8 billion annually.
A new study found that parents of donor-conceived children who sought their siblings' contact experienced positive relationships, often forming close bonds. The practice is creating new family forms based on genetic links and notions of family and kinship.
A recent study found that long-term exposure to marijuana can negatively affect human male fertility by increasing anandamide levels. Additionally, two papers investigate the effects of delayed fatherhood in mice, revealing abnormalities in offspring's behavior and reproductive fitness.
Researchers from Georgetown University Medical Center's Institute for Reproductive Health present studies on involving men in family planning and partner communication about sex. Their work aims to improve reproductive health outcomes by providing men with simple and effective natural options.
The May 2008 issue of Reproductive Health Matters explores the gendered dimensions of disaster in conflict and crisis settings. The article highlights the urgent need for a new humanitarian paradigm that prioritizes the needs and solutions of displaced communities, led by women, to survive and rebuild.
Menopause is thought to be an evolutionary adaptation that helps minimize reproductive competition between females in the same family unit. The researchers propose that older women should cease breeding when younger women start to breed, explaining the observed timing of reproductive cessation in humans.
A study of wild chimpanzees found they do not experience menopause, unlike humans and most other primates. In contrast to human females with several decades of post-reproductive life, chimpanzee reproductive declines occur in tandem with overall mortality.
A new molecular pathway, PROK2 signaling, is critical to the development of neurons controlling the reproductive system. The study's findings could enable better understanding of human reproduction, particularly idiopathic hypogonadotropic hypogonadism (IHH) and Kallmann syndrome.
Researchers at Stanford University and UCSB found that older men's fertility contributes to human longevity by postponing the date with death. This effect has a spillover impact on women due to gene passing, benefiting the population as a whole.
African naked mole-rats live in colonies where only the queen reproduces, suppressing fertility in females and males around her through bullying. This stress-induced block to puberty is thought to affect hormone regulation and reproductive tract development. Understanding the mechanisms behind this social suppression could lead to insi...
Researchers found kisspeptin levels decrease in male Siberian hamsters as winter approaches, indicating a decline in libido and reproduction. Kisspeptin is believed to play an integral role in coordinating seasonal reproduction in animals.
New analysis of 30,000-year-old Romanian fossils reveals a mix of human and Neandertal features, challenging the hypothesis that Neandertals were simply replaced by modern humans in Europe around 35,000 years ago. The study also shows that these early humans lacked full anatomical adaptations for hunting with spears.
Cost-effective interventions can be scaled up with a focus on local context modification, training of non-physician healthcare personnel, and linking HIV/AIDS services. Revitalizing political commitment through NGOs presenting evidence to policymakers and economic arguments can also drive progress.
A global study published in The Lancet found that over a quarter of women worldwide reported physical or sexual abuse by an intimate partner, with severe acts more common in traditional rural settings. Women's education and marital status did not explain these differences, suggesting other risk factors are at play.
Egg donation for stem cell research is a contentious issue, with concerns over informed consent, health risks, and distributive justice. Researchers have developed guidelines to balance bioethical principles and reduce risks for donors, exploring alternative sources of eggs and incentivizing participation.
Researchers at Boston Biomedical utilize bioinformatics to study the kinome of Dictyostelium, a model organism revealing unique enzymes involved in cell biology. The study identifies 46 conserved kinases across all organisms, providing insights into fundamental cellular processes.