Antinori first attracted controversy when he helped a 62-year-old woman have a baby eight years ago by implanting an egg in her womb.

CNN: Team to attempt human cloning

Meat, fish and milk were introduced in the majority at five to six months, and egg was introduced last at eight.

BBC: A child is tested for allergic reactions.

The chicken-egg method requires up to eight months of lead time.

FORBES: Fact and Comment

It took Rovio nearly eight years and 51 tries to lay this golden egg.

FORBES: Connect

Testing the vaccine in ferrets before moving on to humans will take six to eight weeks, eliminating any head start over the traditional egg method.

FORBES: Broken Eggs