According to some quora answer-
The phenomenon of urdhwa reta When one reaches to this state, Vital energy has enormous potential energy. It rises up like steam does and reaches his ajna chakra or the point between his eyebrows. This is called ojas state. [ojas = radiant life energy] . The sperms in such people flow upwards till Agya-Chakra and then are directed towards the female ovary.
The phenomenon of Manas-praveti These people from Sidha-loka and in the higher realm don’t need physical sex to beget a child. They can do it by the strength of mind
Which scripture mention about above things?