Related topics: hormone

For lemurs, sex role reversal may get its start in the womb

Anyone who says females are the 'gentle sex' has never met a lemur. Lady lemurs get first dibs on food, steal their mates' favorite sleeping spots and even attack males, swatting or biting those that annoy them.

Penis development needs more than just testes and testosterone

Proper development of the fetal penis requires not just testosterone from the testes, but a second hormone produced by other tissues, including the placenta, according to a new study publishing February 14 in the open-access ...

Fish undisturbed by flash photography

Fish experience stress, as do mammals and humans. When under stress, fish release the hormones adrenaline and cortisol. A team of scientists spearheaded by IGB has investigated whether flash photography induces an increase ...

Finally, a breathtaking photo of beluga whale snot

The above photo captures a beluga calf exhaling thousands of tiny droplets of respiratory vapour, which are valuable to science. The droplets—snot, essentially—help researchers like U of M's Justine Hudson measure stress ...

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