A study has found that the reason why the evolution of the first animals to appear on Earth was delayed for over 10 million ...

The most recent additions to the scimitar-horned oryx herd at the Smithsonian Conservation Biology Institute are two calves borne from an improved artificial insemination method. Smithsonian ...

The use of assisted reproductive technologies like in vitro fertilization is becoming more common worldwide. However, while these technologies successfully create viable embryos, a little over half of ...

It is essential to ground fertility awareness-based methods in a strong, person-centered evidence base, just the way we would with any other contraceptive option. This article has been updated since ...