This is part of Egg, an attempt to explain why Americans have absolutely lost their minds over egg prices. The Eggsplainer ...

If the egg that's released during ovulation is not fertilized, your period will start about two weeks after you ovulate. During your period, the uterine lining sheds because it's not needed to support ...

Why do some lose cubs after they become pregnant but before the fertilized egg implants itself to the bear’s uterus wall? Polar bear embryos experience delayed implantation, so embryos created ...

Find out where you can get our delicious and fresh duck eggs that everyone’s been raving about. Pope Francis has died at the age of 88, the Vatican says Steph Curry's Geometrically Impossible ...

To get around that, the scientists first tap into the fertilized egg of a pink pigeon and extract what are known as primordial germ cells (PGCs)—the cells that eventually become sperm and egg.

So the kangaroo's body puts the egg's development on pause. "If they're waiting for optimal conditions or maybe for their young to come out, that fertilized egg will just sit, waiting," Forrester ...

This hormone starts appearing shortly after a fertilized egg implants in the uterine lining, usually about 6-12 days after conception. As pregnancy progresses, hCG levels typically double every 48 ...