These “walking sharks” can lay eggs without spending extra energy, rewriting what scientists thought they knew about reproduction.

New research shows that epaulette sharks, often called “walking sharks,” can produce eggs without increasing their overall energy use.

Anti‐Müllerian hormone (AMH) has emerged as a pivotal biomarker in veterinary reproductive health, offering insights into gonadal function across a range of species. Its role in the regulation of ...

Human beings, fish, reptiles and birds have the same hormones in their blood with very similar functions. But why does one find hormone values in some species that are ten times higher than in others?

A study just published in the journal Functional Ecology called "Heavily hunted wolves have higher stress and reproductive steroids than wolves with lower hunting pressure" by Heather Bryan, of the ...

Researchers have discovered that injecting a simple hormone into leeches creates a novel way to study how hormones and the nervous system work together to produce species-specific reproductive ...

Poop samples are an effective, non-invasive tool for monitoring gray whale reproduction, stress and other physiological responses, a new study from Oregon State University shows. Researchers from ...