1.   After the egg has been fertilized, it will hatch in about six weeks.

2.   For a pregnancy to occur, one of those sperm must penetrate and fertilize the egg.

3.   He fertilizes her eggs and makes a hurried exit.

4.   Many of his sperm do not even try to fertilize her eggs but instead either attack other sperm or block their passage.

5.   Once deposited, she leaves the nest and he immediately fertilizes the eggs.

6.   Only one sperm fertilizes an egg, but it evidently requires the backup of many millions of others.

7.   The male will immediately follow behind, fertilizing the eggs.

8.   It only takes one sperm to fertilize an egg.

9.   The egg is fertilized by the sperm.

10.   The sex of the child is predetermined when the egg is fertilized.