From our source in the affirming-parents FB group:

A family with multiple "AFAB" kids who want to stop their periods is not unusual nowadays. This mom has one trans son (already blocked), but now the "genderfluid" 11-year-old wants to nix periods. What to do?

Birth control pills or shots are one option, but an IUD for tween AFABs seems to be a popular choice. One mom had her kid's put in at age 14.

A depressive episode might result from BC pills, but there are other options.

Tinkering with an 11-yr-old's endocrine system is no big deal in 2020. If your genderfluid middleschooler doesn't want to menstruate (how many want to?), maybe start w/an IUD, then move on to T shots.

Note: Putting girls at start of menarche on BC pills has been widely normalized, even those who don't claim trans ID. Total avoidance of periods for convenience sake is a mass experiment. What will be the outcome physically & mentally? How much iatrogenic dysphoria will it cause?

"Research has shown that adolescents who use birth control pills are more prone to be at risk for depression in adulthood."

Suicidal thoughts (in the adolescent girls) also mentioned in this article. https://www.cnn.com/2019/10/30/health/teens-birth-control-pills-depressive-symptoms-trnd/index.html