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Process of Oogenesis

why doe ferti...

Question

why doe fertilisation at ampullary-isthmic junction only leads to pregnancy why not any place else?

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Solution

After the egg is released by the ovary during ovulation it is capable of fertilization only for about 12 to 24 hours. This period of eggs availability falls when it is in ampullary isthmic junction. If the egg does not meet any sperm here then it continues its travel down the uterus unfertilized and is shed.

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Q. Assertion :All copulations do not lead to the fertilisation and pregnancy. Reason: Fertilisation can occur only if the ovum and sperms are transported simultaneously to the ampullary - isthmic junction.

Q. A woman does not want any more pregnancy. Which permanent method will she prefer and why?

Q. Assertion (A): All copulations cannot lead to fertilisation and pregnancy
Reason (R): Fertilisation can only occur if the ovum and sperms are transported simultaneously to the ampullary region

Q. Application Based Questions :
Why not all copulations lead to fertilization and pregnancy?

Q. Choose the correct option with respect to the assertion and reason given.
Assertion (A): Not all copulations lead to fertilisation and pregnancy in human beings.
Reason (R): Fertilisation can only occur if the ovum and sperms are transported simultaneously to the ampullary region of the fallopian tube.

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