Why are menstrual cycles absent during pregnancy ?
Why are menstrual cycles absent during pregnancy ?
The menstrual flow results due to break down of endometrial lining of the uterus and its blood vessels which forms liquid that comes out through vagina menstruation only occurs if the released ovum is not fertilised.
During pregnancy all these stages / phases of menstrual flow stop and corpus leuteum secretes projesterone in large amount which is necessary for care of endometrium. These changes don't let menstrual flow occur during pregnancy. Lack of menstruation may be indicative of pregnancy. However it may also be caused due to some other underlying cause like stress, poor health.
Similar Questions
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:
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:
- [NEET 2023]
Corpus luteum is the source of secretion of
Corpus luteum is the source of secretion of
- [AIIMS 1992]
Menstrual flow occurs due to lack of
Menstrual flow occurs due to lack of
- [NEET 2013]
Ovulation in the human female normally takes place during the menstrual cycle
Ovulation in the human female normally takes place during the menstrual cycle
- [AIPMT 2004]
Arrange the events of menstrual cycle as they occur
$I.$ Secretion of $FSH$
$II.$ Growth of corpus luteum
$III.$ Growth of follicle and oogenesis
$IV.$Ovulation
$V.$ Sudden increase in level of $LH$
Arrange the events of menstrual cycle as they occur
$I.$ Secretion of $FSH$
$II.$ Growth of corpus luteum
$III.$ Growth of follicle and oogenesis
$IV.$Ovulation
$V.$ Sudden increase in level of $LH$