Question

Not all copulations result in pregnancy. Give a reason.

Answer 1

Answer:

In the absence of fertilisation, the corpus luteum degenerates. ... Fertilisation can only occur if the ovum and sperms are transported simultaneously to the ampullary region. This is the reason why not all copulations lead to fertilisation and pregnancy.

Answer 2

Fertilization and pregnancy only occur if the ovum and sperms are transported simultaneously to the ampullary region of the fallopian tube. This is the reason why not all copulations lead to fertilization and pregnancy.