[battle22]

"Good point. Maybe Genji told Yasu that Natsuhi never even knew/remember the gender of the baby."
I see , Something like this.
"Before the cliff accident , Natsuhi was forced to adopt you , thats why she never liked you during those three days, she didn't even bother to ask what gender the child was, trully what a horrible person. but nobody would ever think ,that something like that would have happened ,a true irony , same fate as your mother. It indeed was a horrible accident"

And Knox can't slice this theory up , because story did not confirm the gender , in other words It is permitted for observers to let their own conclusions and interpretations be heard. , So a place for Yasu to be Female exists and I'm one of those people who believe this . XD