Striking colors that are seen only in the males of some species are partly explained by gene behavior, research into guppy fish suggests.
A new study provides a thorough accounting of blood cell production from hematopoietic stem cells. The results are important for understanding disorders such as anemia, diseases of the immune system, and blood cancers such as leukemias and lymphomas.
A single allergic reaction during pregnancy prompts sexual-development changes in the brains of offspring that last a lifetime, new research suggests. Female rats born to mothers exposed to an allergen during pregnancy acted more characteristically 'male' -- mounting other female rodents, for instance -- and had brains and nervous systems that looked more like those seen in typical male animals.
Female birds age more slowly and live longer when they have help raising their offspring, according to new research from the University of Sheffield.
A new study in the Journal of Public Health finds that women in Norway from immigrant backgrounds are more likely to be overweight during pregnancy.
Urogenital schistosomiasis (US), a chronic parasitic disease, is endemic in Ghana and policymakers have undertaken efforts to control it, largely through mass drug administration of praziquantel given to school-aged children. Now, researchers reporting in PLOS Neglected Tropical Diseases have found that awareness of Female Genital Schistosomiasis (FGS), a specific gender manifestation of US, is lacking, which affects the ability to control this disease in girls and women.
The dramatic difference in gonad size between honey bee queens and their female workers in response to their distinct diets requires the switching on of a specific genetic program, according to a new study publishing March 21 in open-access journal PLOS Biology by Annika Roth and Martin Beye of Heinrich-Heine University in Dusseldorf and colleagues. The finding may aid analysis of the interplay of genes and nutrition that drive caste dimorphism in honey bees.
An international group of scientists under the supervision of a staff member of Sechenov University (Russia) and Karolinska Institute (Sweden) found out that earlier views on the mechanisms that provide and regulate skeletal growth were wrong. They discovered a special area of the growth plate (a structure that enables longitudinal growth of bones) called a stem niche that can theoretically produce infinite numbers of new cells. The article of the team was published in Nature.
A team of scientists led by Alida Bailleul and Jingmai O'Connor from the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences reported the first fossil bird ever found with an egg preserved inside its body. This new Cretaceous fossil sheds light on avian reproduction.
The scientists analyzed data spanning more than four decades and concluded that the impact of lake trout in Yellowstone Lake -- in particular, the decline of native cutthroat trout -- has cascaded across the lake, its tributaries and the surrounding ecosystem.