Articles tagged with Ovaries
Women who underwent a hysterectomy before age 45 have a 52% increased risk of developing incident type 2 diabetes, according to a study of over 83,000 French women. The risk remains even if ovaries are not removed and is unrelated to diet and physical activity.
A rat study found that excessive blue light exposure is associated with earlier puberty onset, reduced melatonin levels, and increased reproductive hormones. This suggests a potential risk for childhood development and future fertility.
A large prospective study found that women with endometriosis have a higher risk of ischemic and hemorrhagic strokes compared to those without the condition. The study analyzed data from over 112,000 women and found an association between endometriosis and stroke risk, suggesting that clinicians should consider the whole woman's health...
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.
Children born to mothers with polycystic ovary syndrome (PCOS) are at a higher risk of developing infections, allergies, and other childhood illnesses by age 13. The study found that children of mothers with PCOS were 32% more likely to be admitted to hospital for various health problems.
A new study links polycystic ovary syndrome (PCOS) to an increased risk of adverse cardiovascular events and pregnancy outcomes during delivery, including preeclampsia and peripartum cardiomyopathy. Women with PCOS are at a higher risk for heart complications compared to those without the hormone disorder.
Women with polycystic ovary syndrome (PCOS) are at a higher risk of developing additional medical conditions such as migraine, hypertension, and endometriosis. They also report poorer health and use medications more frequently than women without PCOS.
Biologists at the University of Pennsylvania have discovered a two-sided genomic arms race between satellite DNA and its binding proteins in fruit flies. The study reveals that when these elements interact, significant costs to fitness can occur, including impacts on fertility and cancer development.
A recent study published in Endocrinology found that exposure to a scream sound may lead to diminished ovarian reserve and decreased fertility in female rats. The researchers discovered that the scream sound reduced estrogen and Anti-Mullerian hormone levels, as well as the number and quality of eggs, resulting in smaller litters.
Intermittent fasting produces mild to moderate weight loss and improves cardiometabolic risk factors, comparable to traditional calorie-restricted diets. The review also dispels myths about intermittent fasting, including the misconception that it leads to weakness and decreased concentration.
Researchers found that high levels of anti-Mullerian hormone (AMH) may cause follicles to mature too quickly, leading to problems with ovulation and fertility in women with PCOS. AMH was previously thought to be a passive byproduct of the disorder.
A meta-analysis of over 3,000 studies found that women with one ovary have a 30% lower chance of becoming pregnant and giving birth after IVF. The study suggests that surgical removal of an ovary has an adverse effect on fertility.
A UMass Amherst study found associations between oral contraceptive use and certain tubal ligation methods with lower levels of antimüllerian hormone (AMH), a biomarker for ovarian aging. This may suggest an increased risk for early menopause in women who have used oral contraceptives or undergone specific types of tubal ligation.
A study published in PLOS Medicine found associations between obesity and various female reproductive conditions. Researchers used Mendelian randomization to investigate causal links between body mass index, waist-to-hip ratio, and risk of conditions like uterine fibroids and pre-eclampsia.
A study of over 200,500 women found an increased risk of death in younger pre-menopausal women when ovaries and fallopian tubes were removed during surgery. In contrast, the procedure is safer for older post-menopausal women, whose ovaries have already stopped producing estrogen.
A large population-based cohort study found that combined oral contraceptives reduce the risk of type 2 diabetes and pre-diabetes in women with PCOS by 26%. Women with PCOS have twice the risk of developing type 2 diabetes or pre-diabetes, highlighting the need for treatments to reduce this risk.
Researchers found a chemical inhibitor of PDE9 stimulates cells to burn more fat in mice, reducing obesity and fatty liver. The study's findings suggest the experimental drug may be effective in treating severe obesity and improving heart function.
A recent study found that women previously infected with COVID-19 have similar ovarian reserve and fertility treatment outcomes compared to those without a history of the virus. The study monitored hormone levels in 46 patients undergoing IVF in Spain between May and June 2020, revealing no variation in anti-Mullerian hormone (AMH) lev...
A new study led by Kotaro Sasaki elucidates the early biological processes involved in the development of ovaries and testes in human embryos. Researchers analyzed single-cell transcriptome data to understand gene expression at each developmental stage, providing insights into typical and atypical gonadal development.
A study by Queen Mary University researchers investigated how women at high risk of ovarian cancer make choices about possible preventive surgery. Women who have BRCA1 and BRCA2 genetic mutations have a higher lifetime risk of ovarian cancer, and may choose to undergo surgery to reduce their risk.
A retrospective study of patients with ovarian torsion found that older age, larger ovarian size, and gynecologic oncologist performance were linked to increased oophorectomy rates. The study suggests that surgeon ability to diagnose necrosis is poor, and patient race does not impact the likelihood of oophorectomy.
Research reveals significant microbial changes in women with polycystic ovary syndrome, associated with metabolic health. The study also found differences in microbiome profile between pre-diabetic and healthy women, shedding light on the causes of the condition.
A recent study by Carnegie Institution scientists mapped gene activity in thousands of immature egg cells and helper cells to understand how ovaries maintain female fertility. The research showed that follicles, where eggs mature, have a finite number of cell clusters assembled before birth.
A study published in PNAS reveals that fruit development rewires the central metabolism pathway in tomatoes via increased sensitivity to gibberellin. The role of this hormone in fruit-setting ovaries was previously unknown and has significant implications for breeding parthenocarpic fruits.
Women in their 30s and 40s with polycystic ovary syndrome (PCOS) are at a higher risk of developing cardiovascular disease. Despite this, the risk appears to decrease for women over 50. The study highlights the importance of maintaining heart health through lifestyle changes such as exercise and a balanced diet.
A research team led by Dr. Alida Bailleul has found that ovarian follicles can be preserved in fossils more than 120 million years old, confirming the function of a single functional ovary in birds. The study uses scanning electron microscopy and other methods to analyze fossilized tissues and compare them to extant bird follicles.
Researchers found that olaparib depletes the store of immature eggs in mouse ovaries by 36%, potentially affecting a woman's fertility. Fertility preservation counselling should be considered for young female patients prior to olaparib treatment.
A study funded by NIH analyzed nearly 900 women with irregular menstrual periods and identified two PCOS subtypes, each associated with distinct groups of gene variants. The reproductive subtype had higher levels of luteinizing hormone and lower BMI, while the metabolic group had a higher BMI and insulin levels.
Researchers at The Francis Crick Institute identified a genetic cause of testicular tissue developing in people with female chromosomes. They found that mutations affecting the Wilms' Tumor 1 (WT1) gene lead to an imbalance that favors male testis development.
Researchers have found that genes associated with female hormone synthesis and ovarian follicle development play a more complex role in oocyte maturation. The study reveals new information on the ovarian function, which can improve diagnosis and treatment options for female infertility.
Researchers at Karolinska Institutet found that so-called egg stem cells do not exist in the human ovary, contrary to previous reports. The study's comprehensive map of ovarian cells will contribute to the development of new methods for treating female infertility.
A study from Ann & Robert H. Lurie Children's Hospital of Chicago defines the safest laparoscopic technique for removing ovaries in girls, resulting in better quality ovarian tissue for future transplantation. This technique minimizes damage and maximizes fertility preservation, increasing pregnancy rates after transplantation.
Researchers have identified the location of structural proteins in a pig ovary, paving the way for 3D printing an artificial ovary that can support eggs and hormone-producing cells. The technology has huge potential for girls who undergo fertility-damaging cancer treatments.
Research suggests that women with polycystic ovary syndrome (PCOS) are more likely to develop poor respiratory health based on lung function tests. PCOS is believed to affect almost one in six women and often runs in families, while also increasing the risk of diabetes, which has been linked to lower lung function.
Women who started estrogen therapy before age 60 with their ovaries removed experienced reduced mortality over long-term follow-up. However, older women or those above 70 without ovaries did not derive this benefit and may have adverse effects of treatment.
Kyushu University researchers discovered that reduced oxygen and mechanical compression play crucial roles in achieving and maintaining a dormant state in mouse egg cells. By limiting oxygen and increasing the protein FOXO3, they created egg cells similar to those found in nature.
A large-scale study found that high levels of air pollution negatively affect ovarian reserve and female fertility marker anti-Mullerian hormone (AMH) levels in Italian women. Exposure to particulate matter and nitrogen dioxide increased the risk of reduced AMH concentrations, leading to a lower ovarian reserve.
Research by an international team including the University of Saskatchewan has found toxic metals in European eels' ovaries, potentially jeopardizing their reproductive success. The metals, including mercury and copper, are concentrated in the eels' bodies during their journey to spawning grounds.
Scientists at FAU create porous scaffolds using electrospinning to support ovarian follicle growth, showing promising results. The goal is to develop an ideal artificial ovary that mimics the natural environment for follicle maturity, potentially increasing fertility in cancer patients.
Researchers at UC San Francisco have found that female mice live longer than males due to the presence of two X chromosomes. Having both female sex chromosomes and gonads extended life in mice, with most of the effect coming from the sex chromosomes.
Researchers found that hysterectomy in rats with intact ovaries led to a memory deficit, suggesting the uterus may have functions beyond reproduction. The study tested rats with different types of menopause surgical interventions and found that only those with just the uterus removed had a negative effect on working memory.
A new photoacoustic imaging technique may help diagnose ovarian cancer at an early stage, improving survival rates. The technology uses transvaginal ultrasound and co-registered photoacoustic tomography to reveal information about tumor angiogenesis and blood oxygen saturation.
Researchers at the University of Arizona are working on a disposable falloposcope to detect early-stage ovarian cancer. The device aims to reduce unnecessary procedures and improve patient outcomes by providing accurate screenings for high-risk women.
Researchers found that cancer cells from the fallopian tube affect ovary's chemical signaling, leading to increased norepinephrine levels, which drive cancer cell migration. This study highlights the importance of understanding chemistry in ovarian cancer development and treatment protocols.
Researchers at Ann & Robert H. Lurie Children's Hospital of Chicago report successful surgical techniques and outcomes for single ovary removal in girls as young as 5 months old. The procedure causes no complications and can be performed on an outpatient basis without delaying cancer or other therapies.
A Mayo Clinic study found that premenopausal women who have their ovaries surgically removed face an increased risk of developing chronic kidney disease. The risk is highest for those younger than 46, with a 7.5% increased risk.
New technology enhances CRISPR-Cas9 gene editing efficiency in mosquitoes, allowing for easier manipulation of gene expression in a wide range of species. This breakthrough enables control of vector-borne diseases, elimination of agricultural insect pests, and potentially gene therapy for human and animal health.
Scientists at the University of Wisconsin-Madison found two genes, IRX3 and IRX5, that work together to construct a cellular communication system in mouse ovaries. This system, involving junctions between eggs and granulosa cells, helps ensure proper egg development and survival leading up to ovulation.
A survey of women with polycystic ovary syndrome (PCOS) reveals distrust in healthcare providers and a lack of emotional support as major contributing factors to negative medical experiences. Women with PCOS often wait years for diagnosis and receive limited information about the disorder, leading to arguments with physicians.
Scientists successfully isolate and grow human follicles to 'biofunctionality' on a bioengineered ovarian scaffold made of decellularized tissue. The breakthrough uses early-stage follicles from patients with frozen ovarian tissue for fertility preservation.
A new study by researchers at Uppsala University found that the pesticide linuron impairs male frogs' fertility and causes a female-biased sex ratio. The study used the West African clawed frog as a model organism to investigate the effects of pesticides on amphibian reproduction.
Researchers have identified a critical non-coding DNA element regulating the Sox9 gene, crucial for male sex development. Deleting this enhancer results in sex reversal in mice, shedding light on the genetic mechanisms underlying sex determination and potentially improving diagnosis for patients with differences in sex development.
Research found that women with PCOS are two to three times more likely to develop non-alcoholic fatty liver disease, regardless of their weight. High testosterone levels also increase the risk, even in normal-weight women.
Researchers have successfully treated two participants with stem cells, increasing estrogen levels and alleviating menopausal symptoms. The treatment has also led to the resumption of menses and potentially restored fertility in these patients.
A new study published in the Endocrine Society's Journal of Clinical Endocrinology & Metabolism found that women with PCOS have less diverse gut bacteria, which may influence the development of the condition and its impact on quality of life. Elevated testosterone levels in women with PCOS were linked to these changes.
Researchers found that women with PCOS have less diverse gut bacteria compared to those without the condition. Elevated testosterone levels in PCOS may contribute to these changes, suggesting a potential link between the microbiome and the development of PCOS.
A new study finds that hysterectomies with ovarian conservation increase the risk of hyperlipidemia, hypertension, and cardiovascular disease. Women under 35 are at greatest risk for congestive heart failure and coronary artery disease.
A Mayo Clinic study reveals that hysterectomy alone is associated with a significantly increased risk of cardiovascular diseases and metabolic conditions. Women under 35 had a high risk of congestive heart failure and coronary artery disease.
Belgian researchers have created a new artificial ovary prototype that resembles human ovarian tissue in terms of architecture and rigidity. The fibrin-based design could be used for ovary transplant, providing alternatives for women with infertility or cancer patients unable to conceive after treatment.
Researchers at University of Wisconsin-Madison discover estrogen produced in brain is necessary for ovulation in monkeys, potentially revealing cause of infertility problems and pointing to new methods of birth control. The discovery challenges traditional understanding of hormonal cascade leading to egg release from ovaries.