Which layer of the uterine wall breaks down during the menstrual cycle?

The time for optimum chances of conception in a woman is . . . . . . starting from the day of menstruation.

The corpus luteum secretes which of the following?

Given below are two statements with respect to the menstrual cycle.
$Statement-I$: The menstrual phase in the menstrual cycle occurs when an ovulated egg is not fertilized and is thus shed out along with the endometrium.
$Statement-II$: The menstrual phase is often referred to as the 'funeral of an unfertilized egg'.
Choose the most appropriate answer from the options given below.

Which one of the following statements is incorrect about the menstrual cycle?

When do both $LH$ and $FSH$ attain peak levels in the menstrual cycle?