Now what I am about to discuss could very well be a requirement in the present social scenario.
Now what if you are a man/boy and the girl/woman whom you are having intercourse approaches you telling that she is pregnant – and you are not sure if its you who got her pregnant?
Or the reverse – a girl/woman who has multiple partners and is not sure who will be the father.. lol.. Now there is paternity test before birth -that is you can find out the details using non invasive methods and it eliminates the risks involved in other methods.