I wants to know that why allah bring Isa a slaam without father. Is there any reason behind it or just to prove what allah can do? Afcoz allah can do anything he is the most powerful n most beneficial.

Sorry, immaculate conceptions haven't occurred in roughly 2010 years, if thee is a baby.. there was a human man involved somehow with that woman.

God wanted to tell humanity that He can do whatever He likes to do.