If after ovulation no pregnancy results, the corpus luteum
Is maintained by the presence of progesterone
Degenerates in a short time
Becomes active and secretes lot of $FSH$ and $LH$
Produces lot of oxytocin and relaxin
The rupture of the graafian follicle and the release of ovum occurs under the influence of
Changes in $GnRH$ pulse frequency in femail is controlled by circulating levels of
What role does pituitary gonadotropins play during follicular and ovulatory phases of menstrual cycle ? Explain the shifts in steroidal secretions.
Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?
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: