Dr. Paul J Christenson MD

Introduction An average man ejaculates 1/2 teaspoon to 1 teaspoon of semen. This small amount of semen contains millions of sperm cells. It only takes one sperm to fertilize an egg, but each sperm has a limited life span, which begins once it leaves a man's body.For a couple trying to have a baby,...

Cancer affecting the male reproductive system, particularly the sperm and testosterone secreting testes is eminently curable. Unlike many other forms of cancer that ravage the human body, testicular cancer can be eradicated by easily removing its source (the testes) through an inguinal orchiectomy....

Kidney stones are a condition that affects around 15 percent of the world's population. For reasons unknown, the condition's prevalence has increased over the last 30 years. Kidney stones more often affect men than women. What are kidney stones?Kidney stones or renal lithiasis is the formation of...

Rare are the men who have never questioned the size of their penis. Is my penis too small? Is my penis too big? These questions are placed on the list of the most common Google searches. Urologists also confirm that these are the usual concerns their patients express. What is it about penis size,...

The ureters are two muscular tubes that collect urine from the kidneys, transporting it to the urinary bladder where urine is temporarily stored before being expelled. Strictures in the ureters represent tough scars in the walls of the ureter that narrow the interior and block the normal flow of...

What is trichomoniasis?Trichomoniasis or "trich" is a common infection of the reproductive organs. It spreads by sexual contact with the infected person. For this reason, it is a type of sexually transmitted infection (STI). Women are invariably at greater risk. However, the infection is not...