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

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 ...

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

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

Fertilization is the fusion of two haploid gametes, during the process of sexual reproduction, to initiate the development of a new diploid organism with mixed genetical heritage. In flowering ...

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

Using animal in vitro fertilization (IVF) science, Save The Giraffes and their partners have accomplished first time feats in ...

After years of controversy, stem cells are on the cusp of cures for conditions like epilepsy and type 1 diabetes.

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 ...

Texas-based biotechnology firm Gameto developed a more accessible alternative to in vitro fertilization called Fertilo.

NPR's Ayesha Rascoe speaks with Jason Pootoolal, president of Save the Giraffes, about using in vitro fertilization for wild giraffes to save the species from extinction.