If the mammalian ovum fails to get fertilized,which event occurs in the cycle?

What are the events that take place in the ovary and uterus during the follicular phase of the menstrual cycle?

In a $28$ day human menstrual cycle,ovulation occurs on

Given below is a flow chart showing ovarian changes during the menstrual cycle. Fill in the spaces by providing the names of the hormones responsible for the events shown.
$\boxed{\text{Primary follicles}}$
$\downarrow \leftarrow \boxed{A}$
$\boxed{\text{Graafian follicle}}$
$\downarrow \leftarrow \boxed{B}$
$\boxed{\text{Ovum}}$
$\downarrow \leftarrow \boxed{C}$
$\boxed{\text{Corpus luteum}}$

Which one of the following is the incorrect match of the events occurring during the menstrual cycle?

Follicular phase is also called