If you legislate with scientific words, you should know the science.
www.iflscience.com
The text of the EO declares: "'Female' means a person belonging, at conception, to the sex that produces the large reproductive cell." Linking sex and conception seems to bring anti-abortion and anti-LGBTQ+ lingo together, but also demonstrates the lack of knowledge that at fertilization, and for many weeks after, every embryo is female. It's a point that people have been quick to raise online.
In the first few weeks after conception, all embryos look the same. We can call that state "unisex", but the basic blueprint is what we ascribe to female bodies – that's why, for example, everyone has nipples and not just those people who might end up lactating (although everyone has the potential to do that).