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प्रश्न
Why are menstrual cycles absent during pregnancy?
Menstrual cycles are absent during pregnancy. Why?
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उत्तर
The high levels of progesterone and estrogens during pregnancy suppress the gonadotropins which is required for the development of new follicles. Therefore, a new cycle cannot be initiated.
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संबंधित प्रश्न
Name the function of the following:
Corpus luteum
Identify True/False statement. Correct false statement to make it true.
Menstrual cycle ceases during pregnancy.
Why is follicular phase in the menstrual cycle also referred as proliferative phase? Explain.
Explain the events that occur in a graafian follicle at the time of ovulation and thereafter.
Explain menstrual cycle in human females.
Give appropriate biological or technical terms for the following:
The onset of menstruation in a young girl
What is menstrual cycle? Describe it in brief.
Define: Menarche
Give Reasons
Missing of menses is the first indication of pregnancy.
Name the Following
Sloughing of the uterine wall during menstrual flow.
Multiple choice question.
Rupturing of follicles and discharge of ova is known as _______.
Explain the ovarian cycle with its different phases.
Write the answers to the following questions by observing the figure below.
- What does the figure above show?
- Which organs are involved in this process?
- Which hormones are involved in this process?
- After how many days do these changes happen again?
- Explain your opinion about the statement that a woman's body is impure while the above process is going on.
The following is the illustration of the sequence of ovarian events (a-i) in a human female.
Explain the changes that occur in the uterus simultaneously in anticipation.
Identify the phase of the menstrual cycle during which there is a peak in the level of progesterone.
The life of corpus luteum is generally about ______ days in the absence of pregnancy
Menstruation begins due to ______.
How long does the secretory phase of the menstrual cycle last?
Choose the correct order of phases of the menstrual cycle.
Which hormone is secreted by the developing secondary follicles?
Immediately after ovulation, the mammalian egg is covered by a membrane known as ______.
Withdrawal of which of the following hormones is the immediate cause of menstruation?
Menstruation is triggered by a sudden decline in the amount of hormone secreted by corpus luteum. Identify the hormone.
Mature Graafian follicle is generally present in the ovary of a healthy human female around stet ______.
A human female reaches menopause aroung the age of ______.
A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.
| HORMONE A | HORMONE B | |
| Subject 1 | Shows a peak on the 14th Day of the menstrual cycle. | Falls down during the luteal phase. |
| Subject 2 | Shows a peak on the 14th Day of the menstrual cycle. | The level is maintained high in the luteal phase. |
Which structure in the ovary will remain functional in subject 2?
Describe hormonal control in various phases of the menstrual cycle.
The enlarged mature follicle bursts to release the egg.
What groups of animals exhibit the menstrual cycle?
