A non-hormonal, reversible and non-toxic male birth control could be a step closer, with scientists successfully targeting a protein that's crucial in making fertile sperm. Knocking this protein out for a period of time would give men control over their protection window, much like oral…
It does not plug up the vas deferens. One of the (many) advantages RISUG has over vasectomy is that it doesn’t block material from flowing through the vas deferens, and hence avoids the complications from that aspect of vasectomy.
I said that.