Urinalysis and Body Fluids 6th Edition by Majorie DiLorenzo, Susan Strasinger

Exercise 44

Normal sperm morphology when using the WHO criteria is:

A. >30% normal forms

B. <30% normal forms

C. >15% abnormal forms

D. <15% normal forms

Step 1 of 2

Sperm morphology:

Sperm morphology is the structure of sperm evaluation that includes head, tail, neckpiece and midpiece.

• Morphologically incapable sperm results in infertility and it is not capable of fertilization.

• Morphology of a sperm is evaluated when it is viewed under microscope; if the sperm have oval head and long tail then it is considered as normal sperm.

• The sperm with defects in tail and head are considered as abnormal.

• The evaluation sperm morphology should done using WHO (World Health Organization) strict criteria, but most of the clinical laboratory is not following it.

• A WHO criterion says that the normal sperm morphology should be greater than 30%.

Therefore, according to WHO (World Health Organization) criterion, normal sperm morphology is should have “greater than 30% normal forms”. Hence, the correct answer is option.