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प्रश्न
Choose the correct answer:
When pregnancy does not occur, the life of corpus luteum is about _____________
विकल्प
4 days
10 days
14 days
28 days
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उत्तर
When pregnancy does not occur, the life of corpus luteum is about 10 days
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संबंधित प्रश्न
Describe, in brief, the changes the uterus undergoes
(i) to receive the zygote.
(ii) if zygote is not formed
What is the main difference between sperms and eggs of humans? Write the importance of this difference.
Write the site of fertilization and the part where the zygote gets implanted in the human female.
What are the male sex cells in humans called?
Fill in the following blank with suitable word :
The menstrual cycle is controlled by.............
When a human female reaches a certain age then vaginal bleeding occurs for a few days after regular time intervals.
(a) What is this process known as (i) in scientific terms, and (ii) in everyday language?
(b) At what approximate age this process starts in human females? When is the human female said to have attained at this stage?
(c) After how much time is this process repeated? For how many days does this process usually last?
(d) What does the onset of this process in human females signify?
(e) At which particular event in the life of a human female does this process stop temporarily but start again?
(f) At which approximate age of human female does this process stop permanently?
When a female child is born, her ovaries already contain thousands of immature eggs (or ova) contained in immature structures A. On maturing, A bursts open and an egg shoots out of the ovary in a process called B. The process B starts in the females at puberty and occurs again and again after a time period x. Before every occurrence of process B, the inner lining of uterus becomes thick and soft with lots of blood vessels in it. When the egg cell gets fertilised by a sperm, then an event C occurs in the life of mature human female which lasts for time period y leading to the birth of baby. If, however, the egg cell released by the ovary does not get a sperm to fuse with, then the thick and soft inner lining of uterus breaks down and comes out of the female's body in an event called D. The occurrence of event D is controlled by chemical substances E.
(a) What are A?
(b) What is process B?
(c) What is the time period x?
(d) Name the event C.
(e) How much is the time period y?
(f) What is the name of process D?
(g) Name the chemical substances E.
Answer the following question:
Why are family planning measures needed in our country?
Identify the given diagram.
Name the parts 1 to 5. 
Human eggs are______.
