Young people today are taking part in a wider range of sexual practices, such as oral and anal sex, with opposite-sex partners compared to 20 years ago, according to new analysis by the London School of Hygiene & Tropical Medicine and UCL.
Using a simple 'mirror trick' and not-so-simple computational analysis, scientists affiliated with the Marine Biological Laboratory (MBL) have considerably improved the speed, efficiency, and resolution of a light-sheet microscope, with broad applications for enhanced imaging of live cells and embryos.
A new University of Washington study points to yet another human factor that is hampering the ability of fish to reproduce: the timing of our fishing seasons. The study considers how the timing of fishing efforts might disproportionately target certain fish and change the life history patterns of entire populations.
Prematurity is the main complication of pregnancy, and 15 million babies are born preterm worldwide each year. Physicians worldwide have investigated whether vaginal progesterone administration to women with a mid-trimester sonographic short cervix reduces the rate of preterm birth. Now physicians and researchers have found that when all available information is considered in an individual patient data meta-analysis, the results are clear: vaginal progesterone reduces the rate of preterm birth at <28, <30, <32, <34, <35, and <36 weeks.
California researchers have discovered that a medication used to prevent and treat malaria may also be effective for Zika virus. The drug, called chloroquine, has a long history of safe use during pregnancy, and is relatively inexpensive. The research was published today in Scientific Reports.
Scientists at the Virginia Tech Carilion Research Institute (VTCRI) have revealed the pathology of cells and structures stricken by optic nerve hypoplasia, a leading cause of childhood blindness in developed nations.
Researchers have found that diffusion plays an unexpected role in cell differentiation during the early stages of development in the embryos of Drosophila, or fruit flies. Instead of spreading a molecular signal out, it was found that diffusion, facilitated through a carrier molecule, actually concentrates the signal in one place.
Inappropriate use of control switches in the genome may weaken our body's defenses against illness and could contribute to leukemia. The new research examines the production of antibody proteins to fight infections. Antibodies are made by combining a few genes from a large selection but scientists are still trying to understand how this is controlled. This study identifies epigenetic switches that regulate gene selection, keeping the immune system health and active.
In a study published in Stem Cell Reports, Rui Zhao and colleagues have partly solved a long-unanswered basic question about stem cells -- why are pluripotent stem cells that have mutations to block the production of microRNAs unable to differentiate?
Pregnant women with opioid use disorder (OUD) are more likely to receive evidence-based treatment with an 'opioid agonist' -- usually methadone -- in states where those medications are covered by Medicaid, reports a study in the December issue of Medical Care, published by Wolters Kluwer.