A device that releases synthetic hormones slowly over time could one day provide a more practical alternative to daily birth control pills, say scientists.

From 1969 to 1988, 25,000 infants were born early each year as a result of hot weather, and with global warming pushing temperatures higher, more babies will be at risk for early birth.

Watch soldier ants behave more like foragers after scientists change their gene expression.

A microneedle patch can subcutaneously deliver a contraceptive hormone to rats.

Researchers will inject a relaxin-like hormone into sea cucumbers to boost the animals’ numbers.

A brain-activated, bone-derived hormone called osteocalcin regulates the acute stress response in rodents and possibly humans.

Anti-doping agencies are tracking levels of various molecules in athletes’ blood and urine over time to increase their ability to detect drug misuse.

Such differences may help explain accidental pregnancies among women on the pill, researchers say.

They hope to develop the “exercise hormone” into therapeutics that harness the benefits of exercise for people unable to do so.