Now an issue is what do lower level (grassroots) sports do. The UK ran into a controversy over who pays for the SRY screen. From one article in the UK is a cost of 150 pounds. Does the athlete bare the cost or UKAthletics?
Now let's take that down to even college. Probably not going to break the bank even for the poorest athletic departments. Does the NCAA offer help? Does a college require the screening before signing a female athlete? If so, is the cost reimbursed? If the screen shows the SRY who pays for the follow up evaluation (Ross Tucker, Emma Hilton, et al recommend a follow up to see if androgenization occurred)?
Now at the high school level. We are talking a million girls (or thereabouts). Younger ages the numbers only grow. For every person with the SRY a follow up medical evaluation would be needed. Let's also not ignore that this might come as a surprise to some. They were likely reared as a girl and now told you are a boy even if all outward appearances are that you are a girl could be pretty shocking.
You might say: use birth certificates. That would work except some US states allow a person to change the sex on their birth certificates and almost half allow for "X" to indicate gender neutral. (The requirements to get the sex changed vary. Some require a court order or proof of surgery; that is 14 states including a few red states).
