I din't receive any invitation to my birthday!

If I were not here,
If I were not taken birth,
What could have happened?

If I am absent,
If there is nobody called 'myself',
What could have happened?

It is not difficult to give birth to human,
So as mine took place,
With out great difficulty,
With out my knowledge,
No is invitation is sent to me for my own birth,
Not even a small intimation!

What if I knew I would take birth?