Comparison of Rates of Penetration of Unwashed and Washed Spermatozoa in Cervical Mucus.

Abstract
Human spermatozoa, in vitro, can penetrate human cervical mucus at an avg. rate of 0.2-0.5 mm./ min. during the pre-ovulatory and post-ovulatory phases of the menstrual cycle. During the ovulatory phase, when the quantity of mucus is greatest and of lowest viscosity, the rate of penetration is increased to 1.0 mm. to 2.0 mm./min. Washing the spermatozoa in Ringer''s soln. does not significantly alter their rate of penetration.