A new study refutes popular assumption that hormone levels in women alter perceptions of male attractiveness. The study reveals hormone levels do not influence the type of men women find attractive.
Estrogens were significantly elevated in fetuses that later went on to develop autism. Higher levels of prenatal estrogens were more predictive of ASD than higher levels of prenatal androgens. The study supports a twenty-year-old theory that increased prenatal sex steroid hormones are a potential cause of autism spectrum disorder.
Researchers report they are able to see alterations in gene expression up to two hours after a stickleback fish interacts with an intruder. They speculate the changes in gene expression and chromatin modification could help set up the brain to respond to future threats. The study appears in PLOS Genetics.
Higher levels of the hunger hormone ghrelin predict a greater preference for smaller, immediate financial rewards over larger, delayed financial rewards.