• orclev@lemmy.world
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    17 hours ago

    As the article points out until the genitalia develops it’s impossible to accurately predict the sex of a fetus due to instances of fetuses with XY chromosomes occasionally developing as female. On the other hand it should be impossible for an XX fetus to develop as male as far as I know.

      • orclev@lemmy.world
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        17 hours ago

        Thanks for the correction. I guess that makes sense considering that the Y chromosome is just a mutant X chromosome, so there should exist mutations of the X chromosome that would result in male genitalia or intersex genitalia developing.

    • FaceDeer@fedia.io
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      16 hours ago

      It’s rare but possible. Basically, the piece of the Y chromosome that hosts the SRY gene can wind up swapped onto a different chromosome and still work its magic. You really only need that one single gene to trigger the whole cascade of development that makes a person male.

      I think another interpretation of Trump’s order is that nobody is female, since no embryos are capable of producing the “large reproductive cell” at conception. At conception they’re just a single cell, they aren’t producing any reproductive cells yet. That’s not until quite a while later in development.