Articles tagged with Reproductive System
A new study found evidence that multituberculates, an extinct group of mammals, likely reproduced in a placental-like manner. This discovery questions the long-held idea that marsupials were less advanced than placentals in terms of reproductive strategy.
Researchers discovered that human egg cells skip a crucial metabolic reaction to maintain their reproductive capacity without losing energy, allowing them to remain dormant in ovaries for up to 50 years. This finding explains why some women with mitochondrial conditions linked to this reaction do not experience reduced fertility.
A Phase 3 study found fezolinetant to significantly reduce the frequency and severity of moderate-to-severe vasomotor symptoms associated with menopause. The treatment also improved sleep disturbances, supporting its use for treating moderate-to-severe hot flashes.
A new study by UCSF and UCLA finds that nearly half of US OB-GYN residency programs may lack abortion training if Roe v. Wade is overturned, posing significant risks for patient care. The researchers estimate that 44.8% of programs are in states where abortion will be banned, while 43.9% of residents have received training in these sta...
A Canadian research team found that pregnant women and their unborn babies are sensitive to environmental contaminants like endocrine disruptors. The study highlighted the role of the placenta in regulating maternal physiology and fetal development, and linked early exposure to certain EDs with breast cancer and prostate cancer risk.
A recent study published in ACS Omega analyzed protein levels in semen of men who recovered from COVID-19 and found significant reductions in sperm count, motility, and normally shaped sperm. The researchers also detected changes in fertility-related proteins such as semenogelin 1 and prosaposin.
A Washington State University study found that cannabis vapor exposure lowered sperm counts and slowed movement in male mice and their sons. The study suggests that cannabis use may be detrimental to male reproductive function, contributing to declining human sperm counts.
A more inclusive definition of infertility could help explain why current diagnostic tests frequently fail to find a reason for reproductive failure. This broader view may also open up novel opportunities for tailoring infertility treatments to each couple, considering the complex network of interacting male and female genes.
Researchers at University College London discovered that worm mothers secrete a milk-like fluid to support their offspring's growth. This unique selfless act helps explain mysteries about the biology of ageing in nematode worms, which could have far-reaching implications for understanding human ageing.
Researchers at Kyushu University successfully reconstitute the ovarian follicle from mouse stem cells, generating functional egg cells and growing viable mice. This breakthrough could lead to new treatments for infertility and help conserve endangered animals through egg cell production.
Researchers found that UVB phototherapy increases levels of romantic passion and aggression in both men and women. Exposure to sunlight affects the endocrine system's regulation of sexual hormones.
A comprehensive review of plant reproductive systems provides new perspectives on heterostyly, highlighting recent advances and unresolved questions. The study explores the ecology, evolution, genetics, and genomics of plant reproductive strategies, shedding light on their role in ecological interactions and evolutionary change.
Researchers at NIH reveal that COUP-TFII determines sex-specific reproductive system development in mice. Female mouse embryos without COUP-TFII display both male and female ducts, indicating the active removal of male reproductive systems.
A new study by UCLA researchers found that Bisphenol S (BPS) damages a woman's eggs at lower doses than BPA. The study exposed roundworms to various concentrations of BPA and/or BPS, revealing decreased fertility in those exposed to either chemical.
Two UConn projects, a light imaging system for rapid ovarian cancer detection and an artificial salivary gland for dry mouth relief, are developed with the help of the BioScience Pipeline Program. A bone scaffold system that can replace bone grafts is also being created.
New UCLA research demonstrates that BPS, a common replacement for BPA, speeds up embryonic development and disrupts the reproductive system. Exposure to low levels of BPA and BPS alters physiology in as quickly as 25 hours, leading to premature birth and disruption of reproductive endocrine brain cells.
A newly discovered mechanism in worms suggests that mothers sacrifice their health for future generations, fueling egg cell development with fats. This phenomenon raises the possibility of a similar trait in humans, potentially impacting reproductive success and lifespan.
A new study by WSU geneticist Patricia Hunt and colleagues reveals BPA can damage chromosomes, disrupt egg development, and increase the risk of miscarriages and birth defects in rhesus monkeys. The research bolsters earlier findings on reproductive effects in rodents and raises concerns about human exposure to this common chemical.
The new report updates the landmark STRAW system, providing a clearer understanding of reproductive aging in women from pre-menopause to the late postmenopausal period. The updated stages include significant revisions, offering more precise definitions and predictions for the onset of menopause.
A Kaiser Permanente study found that workers exposed to high levels of Bisphenol-A (BPA) in their jobs had a quadruple the risk of erectile dysfunction and seven times more risk of ejaculation difficulty. This is the first human study to measure the effects of BPA on the male reproductive system.
A cohort study of over 2,000 Air Force veterans found that dioxin exposure was associated with a lower incidence of benign prostate hyperplasia (BPH) and decreased testosterone levels. The study suggests a link between dioxin exposure and endocrine disturbances in the male reproductive system.
Researchers discovered a new brain hormone GnIH that directly inhibits the action of gonadotropin-releasing hormone (GnRH), stimulating the reproductive system. This finding suggests that GnIH plays a similar role in humans and other mammals, offering potential new treatments for infertility and precocious puberty.
A new mouse model reveals that early pregnancy loss is triggered by the immune system's interference with reproductive hormones, specifically progesterone. This finding may contribute to human infertility and recurrent pregnancy loss, providing a potential target for therapy.
A study by Ohio State University researchers found three genes associated with regulating thyroid hormones in the hypothalamus, which controls the hamster's reproductive cycle. The genes were active in hamsters kept in both long and short days, enabling them to respond to seasonal changes.
Researchers found that exposure to short days triggers immune system enhancements in mice, which last for approximately 20 weeks. The immune system returns to its non-enhanced status after 32 weeks, even if short days remain. Melatonin levels are believed to play a key role in this process.
A Dartmouth-VA study found that for-profit hospital ownership is associated with higher per capita Medicare spending and faster spending growth compared to non-profit hospitals. The analysis controlled for various factors that might influence health care costs.