Intra-vas gadget: The vasa deferentia will also be occluded by an intra-vas gadget (IVD). A little Slice is produced from the decreased abdomen and then a delicate silicone or urethane plug is inserted into each vas tube thereby blocking (occluding) sperm. Castration in males. The testicles are surgically taken out. https://reidgfczu.liberty-blog.com/33035701/vasectomy-an-overview