Question

state in brief the changes that take place in a fertilized egg zygote till birth of child in the human female reproductive system what happens to the egg when it is not fertilized

Answer 1

If fertilisation of egg doesn't takes place then the blood lining formed to nourish the zygote,  breaks down and moves out of the body this process is called mensturation. This occurs for 2-5 days in every 28 days of gap. Thus menstruation cycle marks no pregnancy.

Answer 2

Here is ur answer.....