they inject you with a gel that literally destroy spermcells that pass through the duct. Since it leaves the spermatgonia(cells that replicate into sperm cells) it will not cause a permanent sterilization. It should be possible to wash it out with a simple solution. there are no definite drawbacks as of yet, however according to medical magazines (in germany) going around among gynacologists and urologists, there seems to be quite a bit of discussion as to how was the ten year period determined, and that the solution might not wash it out properly. in that case it will require ambulant surgery, so it you could leave the same day you had the surgery.
Since india already adopted clinical trials and also aborted them due to anomalies appearing, however those were not proven in every case. Also some unusual components were detected in the urine of people that received the test, and the solution to inject it with and the solution to wash it out with are known for causing kidney damage. Since the fluid should not pass through the kidney it should however be kept at the bare minimum.
well the last thing is a newer version that's based on a magnitized gel, that can be removed and repositioned by applying magnetic fields, so no washing out^^
