@Mumofstanley
Babies are not born man, woman or intersex, they are born male, female or intersex. Man and woman describe adults not infants.
Yes, you are right that we are not born as men or women but male or female. But we really should not accept this narrative that we are born male, female and intersex.
Just as we don't write babies are born with ten fingers and toes and 12 fingers and toes.
We are born male and female. Full stop.
A very small number of male and female babies are born with a DSD. Differences in Sex Development is the collective term for 40 different but specific conditions affecting sex development in humans.
1 in 5000 babies require specialist input in determining sex - these are cases of a baby born with ambiguous genitalia. (The prevalence of polydactyly in live births is 1 in 500.)
That's approximately 130 babies per year in the UK. In about 7 or 8 of these babies, even specialist input does not lead to conclusive results and sex is assigned based on all available results and discussion with the parents.
Taking the numbers over a two year span, this sex assignment may eventually (often in adulthood) be found to be wrong for 1 of these babies. That's 1 in 260 babies with ambiguous genitalia, or 0.0001% of the population.
Statistically speaking then, every two years one person with a DSD in the UK decides to have their sex reassigned because the doctors got it wrong at birth. But the doctors don't simply guess and assign a sex arbitrarily where a baby isn't obviously male or female at birth.
(Those numbers are from the submission to the Scottish Census Draft Bill by dsdfamilies, a small charity supporting parents of children diagnosed with a DSD as well as the children themselves.)
So, even 94 to 95% of children born with ambiguous genitalia can after investigation be determined to be unequivocally male or female. There are no true hermaphrodites in humans (that is persons capable of producing both types of gametes, neither at the same time nor one after the other), and there are no non-binary bodies.
Ergo, when making statements concerning the norm, it is correct to simply say humans are born male and female. Unless you typically say babies are born with 10 fingers and toes and 11 or 12 fingers and toes. That is ten times more common in babies than ambiguous genitals after all.