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An investigation of the liquefaction of human semen was performed using a technique of nuclear magnetic resonance, by measuring the time of spin-spin proton relaxation. Measurements made at 24 degrees C over a 15-day period showed that significant degradation processes and protein transformations occurred during the first 5 days. Different phases of these processes were identified.

The 46, XY, 45, X mosaicism is a complement found only once among 39,557 males at birth [18]. The spectrum of phenotypes associated with this mosaicism is continuous ranging from female phenotype with or without Turner syndrome, to mixed gonadal dysgenesis, hermaphroditism, or occasionally almost normal males [24]. In such mosaicism the Y chromosome is usually rearranged: mainly i(Y) and dic(Y) but also del (Y) and r(Y). In a few cases the cell line with 46 chromosomes contains a minute marker which was assumed to be a Y-fragment (Y-f) or a del (Yq) because of the presence of testicular tissue in subjects with sexual ambiguity [20]. We now report the case of a normal but sterile man with a 45, X/46, X, Y-f caryotype who is HY antigen-negative.