Brown-headed cowbirds show a bias in the sex ratio of their offspring depending on the time of the breeding season, researchers report in a new study. More female than male offspring hatch early in the breeding season in May, and more male hatchlings emerge in July.
Middle-aged women are more likely than men to have changes in the brain related to Alzheimer's disease, as detected by imaging, even when there are no differences in thinking and memory. This may be associated with hormonal changes due to menopause, specifically the loss of estrogen, according to a study published in the June 24, 2020, online issue of Neurology®, the medical journal of the American Academy of Neurology.
Affection is partly genetic for women but not for men, finds a new study led by the University of Arizona. Those predisposed to being more affectionate may be struggling with 'skin hunger' amid COVID-19 physical distancing.
New research from Boston Medical Center shows that providing education and training to pediatric and family medicine providers about the importance of human papillomavirus (HPV) vaccines, in tandem with healthcare systems changes including starting an HPV vaccination series before the age of 11, improves the overall rate of HPV vaccinations among adolescent patients. HPV vaccinations can help reduce rates of HPV-related cancers, as well as play a role in reducing race- and income-related disparities.
A new study from psychologists at the University of Kansas attempts to shed light on triggers of post-trauma nightmare occurrences -- a topic that has received scant study.
Cleveland Clinic researchers have developed the world's first risk prediction model for healthcare providers to forecast an individual patient's likelihood of testing positive for COVID-19 as well as their outcomes from the disease. According a new study published in CHEST, the risk prediction model (called a nomogram) shows the relevance of age, race, gender, socioeconomic status, vaccination history and current medications in COVID-19 risk.
Learning how to inactivate and reactivate an X chromosome would have important implications for medicine. A notable category of beneficiaries could be people with certain congenital diseases known as X-linked disorders, which are caused by mutations in genes on the X chromosome.
A new set of expert consensus-based recommendations lays out how best to study possible neurodevelopmental impacts of pubertal suppression treatment in transgender youth. Developed by a consensus panel of 24 international scientists, the recommendations were published in the journal Transgender Health.
A research group from the Institute of Molecular Embryology and Genetics (IMEG) at Kumamoto University, Japan has discovered that the gene C19ORF57 plays a critical role in meiosis. The gene appears to be related to the cause of male infertility and could be a big step forward for reproductive medicine.
The current practice of testing most pregnant women for thyroid stimulating hormone (TSH) may be leading to overdiagnosis and overtreatment, according to new research in CMAJ (Canadian Medical Association Journal). http://www.cmaj.ca/lookup/doi/10.1503/cmaj.191664