Reproductive system

Doctor Katarzyna Koziol injects sperm directly into an egg during in-vitro fertilization procedure at Novum clinic in Warsaw October 26, 2010.

When sperm and egg unite — sparks (of zinc) really do fly

Science

Scientists at Northwestern University have now visualized how the eggs of mammals use the otherwise-unexplainable supply of zinc that they develop.

Palestinians Smuggling Sperm Out of Prison

Conflict & Justice

No Redheads Wanted At The Sperm Bank

Conflict & Justice

Endocrine Disrupters: An Overview of the Evidence

Endocrine Disrupters – In Alligators

Tell us about your experience accessing The World

We want to hear your feedback so we can keep improving our website, theworld.org. Please fill out this quick survey and let us know your thoughts (your answers will be anonymous). Thanks for your time!

Bird Eggs Unhatched

A well-preserved egg collection offers a bird ís eye view of species habitat in 19th century Connecticut.

The World

Bird Eggs Unhatched

A well-preserved egg collection offers a bird’s eye view on species habitat in 19th century Connecticut.

The World

A New Way to Make a Baby? Creating Sperm in the Lab

Environment

Scientists in the U.K. claim that for the first time they’ve created human sperm from embryonic stem cells. While the advance is a huge scientific leap that could allow infertile men to have children, it also raises ethical concerns.

We respect your time, attention and privacy

This is a news website, not a click casino. We do NOT employ deceptive behaviors, display annoying ads or use third party cookies and trackers to monetize your visit or help advertisers track you across the internet.

Simply, we ask that you would consider a donation to support the journalism we produce every weekday. Thank you.