So, trump recently passed a whole bunch of anti-trans legislation, but it was written really quickly and has a TON of holes in it. One example is where the order says
“‘Female’ means a person belonging, at conception, to the sex that produces the large reproductive cell,” reads the order. “‘Male’ means a person belonging, at conception, to the sex that produces the small reproductive cell.”
At conception is specifically used here, which means than since everyone is biologically female until about seven weeks in the womb (the same reason men have nipples), everyone in the US is legally female.