The second tier of Fragile X Syndrome segmentation separates the market by application, reflecting how end‑users consume the products. Diagnostics—comprising carrier screening, confirmatory PCR/MLPA tests, and emerging biomarker panels—capture roughly 35 % of total spend, as early detection drives treatment eligibility and insurance reimbursement. Therapeutics dominate with an estimated 45 % share, covering symptomatic drugs, disease‑modifying candidates, and adjunctive behavioral therapies; this segment absorbs the bulk of clinical‑trial investment and pricing pressure. Patient support services, including counseling, educational programs, and specialty pharmacy assistance, represent about 15 % of revenue, underscoring the chronic nature of the disorder and the need for adherence infrastructure. Research tools such as animal models, cell‑line repositories, and data‑analytics platforms occupy the remaining 5 %, reflecting a niche but essential role in pipeline generation. The proportional distribution illustrated in the accompanying pie chart aligns with industry‑reported spend patterns and provides a quantitative baseline for strategic planning.