Question : 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.

Question : Assertion: All copulations do not lead to the fertilisation

1.	Question : 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.
Answer» Solution :FERTILISATION can only OCCUR if the ovum and sperms are tranported SIMULTANEOUSLY to the ampullary-isthmic JUNCTION and ovum is released only once a month. This is one of the reasons why all copulations do not LEAD to fertilisation and pregnancy.