Give reasons for the following: (i) Why can a woman generally not conceive a child after 50 years of age? (ii) Polar bodies are formed during oogenesis and not during spermatogenesis.

Question

TextMenstrual Cycle in Human FemalesOogenesis in Human FemalesCBSE PYQ

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Why does menstruation occur?

(i) Where are testes located in the human males and why ? State two function of the testes. (ii) In the human female, one of the ovaries releases an egg every month. State the changes that take place if (1) the egg is fertilized, and (2) the egg is not fertilized. (iii) What is done during the surgical method in males and females to prevent pregnancy ?

TextHuman Male Reproductive System