Male infertility is also quite different from impotence. A man who is unable to maintain an erection may be very capable of producing sperm that could fertilize an egg. An infertile man is usually able to maintain an erection, but he may be unable to father a child due to problems with sperm count or other factors. I have bought viagra here canadian viagra for sale online looking for viagra ? 100mg viagra online without prescription Clinical Assistant Professor, Department of Pharmacotherapy, College of Pharmacy, Washington State University; Clinical Pharmacy Specialist, Group Health Cooperative, Spokane Cavernosography: Used in conjunction with the dynamic infusion cavernosometry, this test involves injecting a dye into the penis. The penis is then X-rayed so that the venous leak can be seen.