Really? First I hear of it. I was about to write this comment as all "Oops, sorry, not intentional"... But then I got curious and checked around a little, and my current best guess is that you're mistaken:

1) Always only mentioned as female in articles, including by presumably "woke" sources like in an interview at WorldCon75 in 2017.

2) The Wikipedia bio page is chock full of "she" and "her", not a whiff of anything else on the talk page either.

3) Seems to me to sport a "traditionally female" look as far as hairstyle and clothing goes in photos.

4) Both personal web pages feature a traditional nuclear family with children, grandchildren, and "Fred", presumably the husband (and father / grandfather).

So I believe she doesn't.