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प्रश्न
Give Reasons
Missing of menses is the first indication of pregnancy.
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उत्तर
Because the endometrium of the uterus along with the unfertilized egg is given out in the form of menstrual flow.
संबंधित प्रश्न
Explain the role of hormones during the menstrual cycle.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Menarche is the stoppage of menstruation.
What is the menstrual cycle?
The life of corpus luteum is generally about ______ days in the absence of pregnancy
Choose the correct order of phases of the menstrual cycle.
The mammalian corpus luteum produces ______.
The endometrium in the female is the lining of ______.
Distinguish between pollination and fertilisation. Mention the site and product of fertilisation in a flower.
Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the ovule.
Which of the following statement is correct?
Given below is the diagram depicting the menstrual cycle in human beings. Study it carefully and answer the questions that follow.
- Which phases are indicated by ‘C’ and ‘D’?
- Name the structures labelled ‘F’. What is its role?
- Explain the changes in the level of progesterone during phases ‘C’ and ‘D’.
- Which hormone present in the urine confirms pregnancy in human beings?
- Identify the structure labelled ‘E’. Name the hormone released by it.
