I had my vasectomy done in April 2010, and the procedure went very well. I took my first sample back to the doctor after 25 ejaculations in mid-May. This sample came back negative. I took my second sample back to the doctor after 37 ejaculations in mid-June. This sample also came back negative.
My question is this: since both samples were negative, does this mean that I was sterile between the 25th and 37th ejaculations (mid-May to mid-June)?
There is no guarantee that the samples between the first and second post vasectomy sample demonstrating no sperm are devoid of sperm, but we can only assume that they were.
I have seen men with semen samples showing no sperm on the first analysis, sperm on the second analysis, and subsequent azoospermia on the following 2 samples. All of these semen analyses demonstrated only a few non-motile sperm on the second analysis, which most experts would agree is not capable of causing a pregnancy.
Previous studies have shown that all men in one study demonstrated azoospermia after 24 ejaculates. Other surgeons have advocated only a single semen analysis 3 months after the vasectomy.
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