People are pointing out is that at conception there is only one cell, the fertilized egg / zygote. So everyone would have only the "large reproductive cell" (the egg). It's honestly so poorly written that you could also argue it's saying everyone's bigender too

But as an aside, it's actually not even true that XY guarantees someone will be assigned male at birth.People with Swyer syndrome present AFAB or intersex while having XY chromosomes

The opposite is true for people with de la Chapelle syndrome where they have XX chromosomes and present AMAB / intersex.

Many people with either of those never know they have XY or XX . There's also way more possibilities than just XX and XY. You can have XXY, XXYY, just X, and more

[–] a_robot@lemm.ee 5 points 7 hours ago* (last edited 7 hours ago)

just X

Elon's favorite gender.