{TAIL ~ a laser} for irradiating a region within {HEAD ~ the target area}, wherein the vas deferens in that region is thermally coagulated while remaining enclosed within the scrotal skin; and 
{ TAIL ~ a laser } for irradiating a region within { HEAD ~ the target area } , wherein the vas deferens in that region is thermally coagulated while remaining enclosed within the scrotal skin ; and
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH