Oxytocin, a hormone already known for its role in childbirth, milk release, and mother-infant bonding, may have a newfound purpose in mammalian reproduction. In times of maternal stress, the hormone can delay an embryo’s development for days to weeks after conception, a new study in rodents shows. According to the authors, the findings about so-called “diapause” may offer new insights into pregnancy and fertility issues faced by humans.

A research team funded by the National Institutes of Health (NIH) has developed a medication that shows promise in treating acute and chronic pain. The drug, known as VIP36, targets the body’s cannabinoid receptor type 1 (CB1). It was found to be effective in three different animal models for pain and does not appear to cause the harmful side effects that have frustrated other efforts to target CB1. These results enhance understanding of how to design safer and more effective drugs targeting cannabinoid receptors and are an important step towards developing novel, non-addictive treatments for pain.