Abstract
Human sperm are a heterogeneous population, particularly with respect to their morphology, motility, and degree of nuclear maturity. The characteristics of human sperm and the degree of nuclear condensation with variable sexual abstinence times (long, 7 days; short, 12 h) have been studied. Long abstinence led to an increase in the number of sperm and a decrease in their motility, but their morphology remained unchanged. The DNA-protein complex demonstrated by ethidium bromide uptake was unchanged, but there was a significant increase in nuclear stability upon treatment with SDS. The duration of abstinence hardly affected the degree of nuclear condensation or stability of human sperm. The heterogeneity observed is essentially of testicular origin.
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