Non-hormonal male contraceptive Vasalgel™ has proven efficacy in rabbits

(Parsemus Foundation) Vasalgel is a high molecular weight polymer being developed by Parsemus Foundation as a non-hormonal, long-acting, potentially reversible male contraceptive. It is injected into the vas deferens and works by blocking sperm. The results of a preclinical study to evaluate Vasalgel's efficacy were published today. The study revealed that rabbits had no sperm in their semen as early as 29 days post-injection and the contraceptive effect was durable throughout the 12 month study...