Federal health officials published a report on Thursday declaring that the use of hormonal and surgical treatments in young people with gender dysphoria lacked scientific evidence and expressing concern about long-term harms, a stark reversal from previous agency recommendations and the advice of top U.S. medical groups. The report instead …
On the last day of March, surgeons at Massachusetts General Hospital began an operation that they hoped might lead to a permanent change in how kidneys are transplanted in people. That morning’s patient was not a person. It was a pig, lying anesthetized on a table. The pig was missing …
When the biotech company Humacyte designed a study to see if its lab-grown blood vessel worked, it decided to measure whether blood was flowing freely through the high-tech tube 30 days after it was implanted in a person. As those days passed, some of the 54 patients in the study …