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प्रश्न
Read the following passage and answer the question that follows:
Rahini and her parents were watching a television programme. An advertisement flashed on the screen which was promoting the use of sanitary napkins. Rahini’s parents suddenly changed the channel, but she objected to her parents and explained the need and importance of such an advertisement.
What is first menstruation called? When does it occur?
उत्तर
The first menstruation is called Menarche. In human females, the menstrual cycle starts at the age of 11 – 13 years which marks the onset of puberty.
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संबंधित प्रश्न
Explain menstrual cycle in human females.
Give Reasons
Missing of menses is the first indication of pregnancy.
Why menstrual cycle does not take place before puberty and during pregnancy?
The following is the illustration of the sequence of ovarian events (a-i) in a human female.
Name the ovarian hormone and the pituitary hormone that have caused the above-mentioned events.
Detection of which hormone in urine is an indicator of pregnancy?
How long does the secretory phase of the menstrual cycle last?
Corpus luteum ______.
Menstrual flow occurs due to lack of ______.
Spermatogenesis is induced by ______.
Write a short note on Proliferative Phase.
