After vasectomy what happens to sperm. As in any factory, the sperm machinery can start to operate less efficiently. Call us: This means you go home the same day. Your healthcare provider may give you other instructions after the procedure, depending on your situation. Yes, vasectomies are carried out on single men in Australia. Show More. You should see your doctor if you experience pain, swelling, or other discomfort two weeks after your procedure. Generally, the procedure takes less than 20 minutes. What is a vasectomy?