Killifish, or egg-laying toothcarps, are known for their ecological adaptability and species diversity. Two families of ...

The animal kingdom can get pretty weird when it comes to sex and relationships. Different creatures have evolved all sorts of ...

By about 1900 the observations of Hertwig, Fol, and others were brought together to make the now-familiar picture: a single sperm cell penetrates the egg cell; the nucleus of the sperm merges with the ...

The amount of sperm released decreased sharply with each mating during a single day, reducing the males' fertilization rate.

They found that male medaka can mate 19 times per day on average. In the first three mating sessions, the medaka released ...

Scientists hail 'new paradigm in how we deliver IVF' as artificial intelligence is shown to improve IVF selection of best ...

Researchers have uncovered a daily mating capacity for medaka, providing important insights into the relationship between the cost of gamete production and sexual selection.

Working out the kinks of mating in the animal kingdom helps to gain insights into the survival of species. Among animals that have multiple partners ...

Working out the kinks of mating in the animal kingdom helps to gain insights into the survival of species. Among animals that ...

The short-beaked echidna (Tachyglossus aculeatus)  is one of Australia’s most iconic animals. Belonging to a unique group of ...

Researchers used ‘Explainable AI’ techniques to explore which follicle sizes were associated with improved rates of ...

Motherhood is entirely possible at the age 74—for some birds at least. A Laysan albatross ( Phoebastria immutabilis) named ...