secondary amenorrhea
functional hypothalamic amenorrhea
https://en.wikipedia.org/wiki/Functional_hypothalamic_amenorrhea
https://www.wikidata.org/wiki/Q59554760
A form of amenorrhea and chronic anovulation and is one of the most common types of secondary amenorrhea. It is classified as hypogonadotropic hypogonadism.
FHA
functional hypothalamic amenorrhoea
juvenile hypothalamosis syndrome