Pinhead

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The page below is a sample from the LabCE course Semen Analysis. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Semen Analysis (online CE course)
Pinhead

An abnormality referred to as a pinhead is indicated by the arrow. The "head" is oblong in shape and much smaller than that of a normal sperm. A pinhead is actually not considered a sperm because no chromatin is present.