Vasectomy does not work immediately so you must use backup birth control until we do the test and declare your semen free of sperm. The top half of the vas, and the seminal vesicles next to the prostate, can harbor holdout sperm in nooks and crannies for weeks, and occasionally months. That’s why using another birth control method is essential until we do a semen check at the lab and ensure that there are no sperm left in the ejaculate.
We do a test at 12 weeks and, if necessary, a double check at 16 weeks. If your test results are clear you can safely stop backup birth control and enjoy sex ‘au naturel.’
Call Lifelabs a few weeks ahead and book a date and time that’s convenient for you to bring in the semen sample, at body temperature, within 30 minutes of collection. You don’t need to run any red lights.
I will phone you regarding the result of the test.
If the first test shows that you still have sperm we don’t rush in to do another vasectomy. We just stall for time. Most guys will ‘come clean’ within another four weeks but the occasional “diehard” will take longer, up to six months.