NOTE: This is long but shows how conflating sex with gender has implications for the public health.
In the U.S., the CDC has set up the Vaccine Administration Management System to register people for COVID vaccine appointments. The process includes an online survey which can be viewed in this VAMS User Guide
Registrants have the option specify their "Gender" as:
"Female", "Male", "Decline to Specify", or "Other".
It also asks registrants to respond Yes or No to the following statements:
"I am currently pregnant."
"I am currently a nursing mother."
"I am currently living in a nursing home."
The User Guide notes that those first two questions "do not appear if you select male as your gender."
It's reasonable for the government to want to collect data to determine if there are sex based differences in vaccine participation and outcomes. It's also possibly reasonable to want to know if applicants are pregnant or breastfeeding due to possible risks to babies, fetuses or maternal health, which might impact eligibility or informed consent.
But using the word "gender" when they really mean "sex" creates unnecessary ambiguity that could muck up the data and result in actual harm.
The fact that "Other" is an answer option adds to the ambiguity. It seems like an invitation to answer according to gender identity as opposed to sex.
The questions about pregnancy and nursing do not appear if "Male" is the selected Gender, so it seems the questions only appear for "Females" and "Others".
That is problematic because it erases the meaning of Female as the sex class of humans that can become pregnant and breastfeed.
On the other hand, the survey dissociates the word "Mother" from being "Male", so there's that! (However, it does appear to leave the "Mother" door open to those with "Other" "genders" or to those who decline to answer the "Gender" question).
TIF's who answered "Male" based on the initial "Gender" question will not even be asked about their pregnancy and breastfeeding status. This is problematic because important information about vaccine risks or eligibility won't get to the people who need to know.
Finally, I just thought it was funny the way the word "Nursing" appears in two questions in a row. If you answer Yes to the first question (yes I am currently nursing), then you should also answer Yes to the second question because the home you are currently living in is, in fact, a nursing home!