What is your definition of female? Someone with a vulva and other female organs? what if she has a vulva but no ovaries or womb (or has had a hysterectomy)? Is she a woman, then? If so, then a post-op trans woman is a woman. Does she have to have XX chromosomes? If so, many people assigned female at birth and seen by the rest of the world as women (and many who have fully intact female reproductive systems and have given birth) are not really women in your eyes. I’m sure you will find a way to move the goal posts on your definition, though.