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Why are menstrual cycles absent during p...

Why are menstrual cycles absent during pregnancy?

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when pregnancy occurs , high levels of progesterone and estrogens suppress the gonadotrophin (FSH) . The latter is required for the development of new follicles thus , new menstrual cycle cannot be initiated as long as FSH secretion is suppressed.
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PRADEEP-HUMAN REPRODUCTION -ADDITIONAL QUESTIONS (SHORT ANSWER QUESTIONS)
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  2. What is the role of cervix in the human female reproductive system?

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  3. Why are menstrual cycles absent during pregnancy?

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  4. From where the parturition signals aries-mother or foetus? Mention the...

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  5. What is the significance of epididymis in male fertility?

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  6. female reproductive organs and associated functions are given bel...

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  7. During reproduction the chromosome nmber (2n) reduces to half (n) in t...

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  8. write two differences between endometrium and myometrium .

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  9. where do you find corpora cavernosa ?

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  10. What is parturition? Which hormones are involved in induction of partu...

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  11. When and where do chorionic villi appear in humans ? State their funct...

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  12. How does the inguinal hernia develop?

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  13. Name the accessory genital glands in male .

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  14. How is corpus luteum formed ? What is its funcation ?

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  15. Name the accessory structures of female reproductive system .

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  16. What is spermatogenesis ? Write down its steps .

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  17. How do leydig cells help in spermatiogenesis ?

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  18. Name some chemicals that are released by acrosome during fertil...

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  19. What is reproducation ? Name the common modes of reproducation ...

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  20. What is gametogenesis ? Name its two types and give difference...

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