Caya® Gel acts by reducing the motility of sperm cells. Before inserting into the vagina, place about one teaspoon (about 4 ml) of Caya® Gel into the cervical cup and onto the external rim of the Caya® diaphragm. The pH value of the gel is acidic and thus creates a hostile environment inside the vagina for the sperm cells. At the same time, the gel has a positive effect on the vaginal fluid. Improved efficacy in two aspects.