Yellow color in a semen specimen may be caused by all of the following except:

• Urine

• Preservation at room temperature

• Medications

• Prolonged abstinence

Normal semen should liquefy:

• Immediately after ejaculation

• Within 1 hour

• Within 3 hours

• After exposure to diluting fluid

Sperm motility after 1 hour should be at least:

• 50%

• 60%

• 70%

• 80%

Before reporting a postvasectomy specimen as negative for the presence of sperm, the specimen must be:

• Stained

• Examined under polarized light

• Diluted

When performing sperm morphology analysis, the minimum number of sperm that should be evaluated is:

• 50

• 100

• 200

• 500

Semen specimens should be processed for analysis:

• Immediately on receipt in the laboratory

• Before complete liquefaction

• After complete liquefaction

• 1 hour after arriving in the laboratory

The normal sperm concentration is:

• 140 to 200 million/mL

• 10 to 90 million/mL

• 20 to 160 million/mL

• 50 to 100 million/mL

Calculate using a 1:20 dilution and the five RBC counting squares of the Neubauer counting chamber, an average of 54 sperm is counted. The sperm concentration is:

• 54,000/cc

• 54,000,000/mL

• 108,000/cc

• 108,000,000/mL

The purpose of diluting semen specimens with sodium bicarbonate and formalin before counting is to:

• Ensure liquefaction of the specimen

• Allow motility to be determined while performing the count

• Enhance the cellular morphology

• Immobilize and preserve the sperm

The sugar of interest in most cases of infertility is:

• Glucose

• Maltose

• Fructose

• Sucrose