label: Thick spermatozoon midpiece insertion
label_lc: thick spermatozoon midpiece insertion
description: "Increased width of the midpiece of the spermatozoon. The midpiece is the structure that is located between the head and the flagella (tail) of the spermatozoon. This term applies if the width of the midpiece increases progressively from the flagella to the head and if the proportion of individual spermatozoa with this anomaly is above the upper limit of normal."