Idea developed in spring 2015, based upon an alternative to well known contraceptives. Prototype and method was matured and adjusted through 2015 and beginning of 2016. Tested in vivo (boars) with good results. No harm to tissue, and able to withstand spermatozoa. The concept is now ready for long term animal test and later in 2018, ready for first-in-man testing. We are looking for investment for next step. Patent Pending and inserting tools.