The virgin birth comes into Christianity by way of the Greek tradition when you read the four gospels for example the only one in which the virgin birth appears in the Gospel according to luke, and leaked was a Greek.

Buddha born from mother side.thats the symbolic birth.

When a ordinary man named Siddhartha get enlightenment. and became buddha,means awakend.
this psychological transformation is called virgin birth as it was not any concern with physical.
So,we can say buddha born from mother side.
Vergin birth is nothing but when you realised and experienced the mystical realisation.you die to your flash and are born to your spirit.your psychology will be transformed.In this condition you identify yourself with the consciousness not with the body you passessed.You realise the mystical thing like you and other are one.
just like
Jesus and father are one.
Thi christ came the way you and I did.
Means not the way it used to .
and same like crist,when he was borned, virginity of his mother was restored .