1.   Development begins with the fertilized egg, which is a single cell, giving rise to a number of smaller cells.

2.   If implantation of a fertilized egg does not occur, this lining breaks down and is expelled from the uterus.

3.   Its end, meaning its goal or end-product, is the production of single cells, fertilized eggs of the next generation.

4.   The eggs were removed and injected with sperm, and the fertilized eggs were implanted in her uterus.

5.   The elephant not only has its beginning in a single cell, a fertilized egg.

6.   The fertilized egg implants and becomes a foetus.

7.   Two days later, they implanted the fertilized eggs back inside me.

8.   Pregnancy begins when the fertilized egg is implanted in the wall of the uterus.

9.   Also on board, in an experiment to see how weightlessness affects spawning, are two red-bellied newts, now dead, and their fertilized eggs.

10.   Although fertilized eggs have been destroyed before, this is the first time such a procedure has been required by law and carried out on such a large scale.