In the $28$ day human ovarian cycle, the ovulation takes place typically on
Day $1$ of the cycle
Day $5$ of the cycle
Day $14$ of the cycle
Day $28$ of the cycle
Match the items given in the Column $I$ with those in Column $II$ and select the correct option given below:
Column $I$ |
Column $II$ |
$(a)$ Proliferative Phase |
$(i)$ Breakdown of endometrical lining |
$(b)$Secretory Phase |
$(ii)$ Follicular phase |
$(c)$ Menstruation |
$(iii)$ Luteal Phase |
The rupture of the graafian follicle and the release of ovum occurs under the influence of
What role does pituitary gonadotropins play during follicular and ovulatory phases of menstrual cycle ? Explain the shifts in steroidal secretions.
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:
About which day in a normal human menstrual cycle does rapid secretion of $LH$ (popularly called $LH$ surge) normally occurs?