Amenorrhea Treatment segmentation by type isolates primary amenorrhea—characterised by the complete absence of menarche beyond age 15—where therapy focuses on inducing pubertal progression, contributing roughly 28 % of 2023 global sales through extended-hormone regimens. Secondary amenorrhea, accounting for the residual share, is parsed into hypothalamic (stress, weight-loss, exercise-induced), pituitary (prolactinomas, Sheehan’s), and outflow-tract (Asherman’s, cervical stenosis) sub-forms; each drives distinct prescription mixes—GnRH agonists, dopamine agonists, or hysteroscopic lysis—whose reimbursement status shapes country-level revenue trajectories.