We're not assigned male or female at birth

[Feedmysheep]

Plain and simplified.

At conception, as zygotes, we are neither sex.
In the embryonic stage we are all female.
The distinct sexes do not emerge until the fetal stage.

It sounds like you want it both ways.

1.) an assignment of female at conception.
2.) but no assignment of male or female until the embryonic stage.

It sounds like you're saying that the default sex assignment of all human beings is female.
And the assignment of something other than female is a latter anomaly.

Is this kind of wanting your cake and to eat it too?