Dear Arvind Dubey Ji and other friends,
You can see in the story that
1. Nowhere is medical science in the story except a Doctor said that the girl is pregnant.
2.Nowhere any of the present scientific rules violated.
3.Bounded within the above rule no.-1, I took the complete liberty of imaginations.
4.Mathematical concept of dimensions I explained here in an interesting way.
5.Took possibilities of aliens in a very new dimensional way.
6.Some psychological theories regarding dreams etc. mentioned in the story.
Therefore it is a science fantasy.
Thanks for comments