The second phase is called the Follicular phase.
Once bleeding has stopped, little pockets of fluid form on one ovary. Each of these pockets contains a ripening egg (also called an ovum). These fluid pockets are called follicles. Which is why this phase is called follicular. Get it?
During this time, the lining of your womb also begins to build itself up again.
By days 10 -14, one of those follicles has reached maturity before the others.