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:
$A$ is false but $R$ is true.
Both $A$ and $R$ are true and $R$ is the correct explanation of $A$.
Both $A$ and $R$ are true but $R$ is NOT the correct explanation of $A$.
$A$ is true but $R$ is false.
Which one of the following events is correctly matched with the time period in a normal menstrul cycle
What are the changes in the oogonia during the transition of a primary follicle to Graafian follicle ?
Match the columns.
Column 1 | Column II |
$(a)$ $6-14$ days | $(1)$ It is known as menstrual cycle |
$(b)$ $1-5$ days | $(2)$ Polar body is down |
$(c)$ $15-28$ days | $(3)$ It is known as proliferative phase |
$(4)$ Endometrium is prepared forimplantation of embryo |
When pregnancy does not occur, the life of corpus luteum is about
Correct hormonal sequence in the increase of menstruation is