The ones born without a uterus are not women. But they don't have to tell everyone.
About half the baby "girls" born with 5-alpha-reductase-2 deficiency syndrome masculinise at puberty. ...For the 1/3 that are girls though... it's a nightmare. Unless they get surgery to stop this awful change, they usually kill themselves.
...she's the one who's biologically female. She's Intersexed, with a body that doesn't quite conform to either a completely male nor completely female norm. But without a Karyotype (gene test) even her OB/GYN couldn't tell that.
But we're not talking about millions of the above now are we.
Millions? Well, if you count all those with minor and asymtomatic Intersex conditions, it’s about 5 million.
But those who have severe, obvious conditions you don’t need ultrasounds, gene tests or the like to detect, maybe 300,000 at most.
That particular woman has an extremely rare condition. Only a handful of cases known in the USA. Most natural sex changes in humans go from female to male. Only about 1% go the other way.
Most women with 46xy chromosomes have CAIS, complete androgen insensitivity syndrome. There’s also Swyer syndrome - they can give birth. There’d be maybe 10,000 of those two together in the US.
CAH syndrome and De La Chapelle syndrome lead to men with the 46xx chromosomes normally found only in women.