A : All copulations do not lead to fertilisation and pregnancy .
R : Fertillsation can occur if the ovum and sperms are transported simultaneously to the ampullary - isthmic junction

Read the following text and answer the following questions on the basis of the same: During sexual reproduction, the male inserts the sperm into the female reproductive tract, and sperm receive by the ovary and after that sperm fuse with the egg (ovum) in the ampullary region, this process is called fertilization, haploid nucleus of sperm fuse with that of ovum to form Diploid zygote. Assertion (A): All copulations do not lead to the fertilisation and pregnancy. Reason (R): Fertilisation can occur only if the ovum and sperms are transported simultaneously to the ampulllary-isthmic junction.

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.

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.

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

Assertion: All copulations cannot lead to fertilisation and pregnancy. Reason: Fertilisation can only occur if the ovum and sperms are transported simulaneously to the ampullary region.

Why do all copulations not lead to fertilisation and pregnancy ? The root cause is ______

Why do all copulations not lead to fertilisation and pregnancy ? The root cause is ______

From a to d which of the following statements are correct ? (a) Fertilisation can occur only if the ovum and sperm are transported simultaneously to the ampullary isthmic junction (b) First movement of foetus and appearance of hair on head are usually observed during the fifth month of pregnancy . (c) On 14^(th) day of Menstrual cycle , the level of progesterone is maximum . (d) The signals for parturition originate from fully developed foetus and placenta