How is polyspermy avoided in humans?

What is colostrum? Write its significance.

Mention the importance of the position of the testes in humans.

What is the composition of semen?

Describe the structure of the human ovum with a neat labelled diagram.

Give a schematic representation of spermatogenesis and oogenesis in humans.

Explain the role of oxytocin and relaxin in parturition and lactation.

Identify the given image and label its parts marked as a, b, c and d

List the various menstrual disorders.