Testicle Biopsy A testicular biopsy can be used to diagnose lumps, causes of infertility, and obtain sperm for in vitro fertilization. The sample should be collected in a wide mouth container and the post vasectomy sperm sample ejaculate must be collected. Taking an average of the sperm samples can give the most conclusive result. This will give you a more comprehensive evaluation of your fertility. Results for at-home post vasectomy sperm sample are usually available within 10 minutes. What do abnormal results mean? Sperm counts can vary on a daily basis. There are several types of…. Sperm count post vasectomy.