When it comes to male contraception, the options are mostly limited to physical barriers such as condoms, permanent measures such as vasectomies, and hormone-based solutions. Kyla Raoult, who recently obtained her master’s degree in polymer science from Stellenbosch University, has developed an on-demand reversible hydrogel that could be used as a reversible, non-hormonal birth control for men. She speaks to Lester Kiewit to explain the concept.