In human female which of the following is incorrect
Menstrual cycle takes $28$ days
Menopause occur at $45-55$ years
The ovulated egg released during pregnancy die
Menstruation takes $4$ days
No new follicles develop in the luteal phase of the menstrual cycle because
Which one of the following is the correct matching of the events occurring during menstrual cycle?
During menstruation the level of progesterone in blood is
Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Endometrium is necessary for implantation of blastocyst.
Reason $R$: In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium.
In the light of the above statements, choose the correct answer from the options given below: