Inhibiting Sperm Motility for Male Contraception: Will the Sperm Tail Be its “Achilles Heel”?

  Figure 2.
Figure 2.

Structure of sperm. A. Major elements of human sperm. B. The ultrastructure of the mid piece (upper) and the principal piece (lower). Note the absence of mitochondria in the principal piece––the main site of flagellar activity.

This Article

  1. MI April 2007 vol. 7 no. 2 68-70