Loss of the X chromosome is associated with reduced chance of natural pregnancy
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Updates every hour. Last Updated: 17-May-2026 20:15 ET (18-May-2026 00:15 GMT/UTC)
The first national in-depth study to examine alcohol use among Australian middle-aged men has found more than two million are drinking at levels that put their health at risk of harm.
Scientists have long known that the immune system plays a key role in aging. As people age, they have weaker responses to vaccination, greater risks of infection and higher levels of inflammation. A new study led by UCLA Health researchers used results of a routine clinical lab test to measure not only immune responsiveness but also how it links directly to a patient’s long-term mortality.