Thanks. I understand the NT message to be that a "reborn" or "born again" person is not defined by gender at all (cf. Gal 3:28), but represents spiritually the fullness of qualities we find in God.

The very first human, a biblical figure that Christians haven't even met, seems to be part of that conception.

https://www.academia.edu/22985606/THE_FIRST_HUMAN_AND_THE_PERFECT_HUMAN_AS_AN_ANDROGYNOUS_CHARACTER