Segmentation by Types classifies dct antibodies into monoclonal, polyclonal, bispecific, and engineered fragment categories, each with sub‑classes that affect manufacturing complexity and clinical positioning. Monoclonal antibodies, the most mature class, dominate the market due to established production platforms and a broad safety profile, encompassing IgG1‑IgG4 subclasses. Polyclonal preparations, though less common, serve niche indications where poly‑epitope coverage offers therapeutic advantage, often derived from animal immunization. Bispecific antibodies, engineered to bind two distinct antigens, are expanding rapidly, with sub‑types such as dual‑variable domain and tandem scFv formats enabling simultaneous pathway blockade. Engineered fragments—including Fab, scFv, and nanobodies—provide reduced molecular weight and enhanced tissue penetration, supporting indications requiring rapid clearance or intracellular targeting. The relative market contribution of each type is shaped by development costs, patent life, and clinical efficacy, furnishing a detailed taxonomy essential for strategic investment decisions.