A research team from the CHUM Research Centre (CRCHUM) has shown that women who have had serious complications during pregnancy are twice as likely to die up to three decades later.
Researchers have created a trifunctional contraceptive gel that contains spermicidal, anti-viral and libido-enhancing agents in one formulation.
There are markedly different outcomes for different species of coral reef fishes under climate change - scientists are now another step closer to uncovering the 'winners and losers'.
Exposure to antibiotics in the first few weeks of life is associated with reduced weight and height in boys up to the age of six, but not girls, reports a paper in Nature Communications. The study, led by Prof. Omry Koren, of Bar-Ilan University, together with Prof. Samuli Rautava, of the University of Turku and Turku University Hospital, suggests that this effect may be due to changes in the development of the gut microbiome.
For mice, the earliest social memories can form at three days old and last into adulthood, scientists report on January 26 in the journal Cell Reports. They show that mouse pups prefer their mothers to unfamiliar mouse mothers as newborns and remember them after up to 100 days apart--although they prefer unfamiliar mouse mothers as adults.
Humans are among the few species that lack overt physical indicators of female fertility. One explanation for concealed ovulation in human females is that hiding fertility from males helps females secure resources from males for raising children. A new model developed by a team of evolutionary scientists casts doubt on this idea, showing that females might have evolved to conceal ovulation from one another, not from males.
A research collaboration between the Graduate School of Bioagricultural Science, Nagoya University, and the National Institute of Physiological Sciences in Japan has demonstrated the recovery of ovarian function in infertile rats that had lacked the peptide kisspeptin, by "rescuing" KNDy neurons. These neurons are therefore key to ovarian function in mammals. The finding suggests a new therapy for women suffering from certain reproductive disorders, which could also be applied to fertility treatments for domestic animals.
Oriana Zinani, a doctoral student in molecular developmental biology at the University of Cincinnati, is part of a team of researchers using zebrafish embryos to study a gene mutation that causes scoliosis, a sideways curvature of the spine that typically occurs in humans just before puberty.
Humans cooperate with each other in large groups to defend territories or wage war. But what underlies the evolution of this kind of cooperation? Researchers at the Max PIanck Institute for Evolutionary Anthropology and Harvard University show that there may be a link between social bonds and participation in large-scale cooperation: Chimpanzees join their close bond partners when fighting rivals. In humans, too, social bonds may have been essential to the evolution of cooperative abilities.
It is now the third year that gray whales have been found in very poor condition or dead in large numbers along the west coast of Mexico, USA and Canada, and scientist have raised their concerns. An international study published this week in the journal Marine Ecology Progress Series, led by Aarhus University researcher Dr Fredrik Christiansen, suggests that starvation is contributing to these mortalities.