Diosgenin is primarily used in the manufacturing of------

Diosgenin is a phytosteroid sapogenin extracted from the tubers of Dioscorea species (wild yam). It serves as a crucial precursor for the semi-synthesis of various steroid hormones, most notably progesterone. Progesterone and its derivatives are key active ingredients in oral contraceptives. Therefore, diosgenin is primarily used in the manufacturing of birth control pills.

Answer: birth control pills