In the human female, menstruation can be deferred by the administration of
combination of $FSH$ and $LH$
combination of estrogen and progesterone
$FSH$ only
$LH$ only.
Lack of menstruation is caused due to
Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?
What are the changes in the oogonia during the transition of a primary follicle to Graafian follicle ?
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:
Secretion of progesterone by corpus luteum is initiated by