Size and size distribution of subfertile human spermatozoa

N. Lauffer, S. Segal, M. Ron, N. B. Grover

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5 Scopus citations


An improved apparatus for measuring the electrical size (shape factor times volume) of particles based on the Coulter counter principle was used to characterize 110 subfertile semen specimens; size distributions were attainable in the 97 cases with a count above 1 x106 spermatozoa/ml. The typical size distribution was unimodal and positively skewed. Spermatozoa maintained a constant profile during their passage through the orifice of the sizing apparatus, with an effective shape factor of 1.28. Two groups of cells were found. The larger one consisted of 68 specimens with a modal volume of 18.1 ± 2.0 cu μm and a cell count of 27.5 ± 9.2 x 106 spermatozoa/ml (mean ± 1 SD). The smaller group contained 29 cases and had a modal volume of 6.6 ± 0.9 cu μm and a count of 10.2 ± 7.8 x106. Samples with cell counts below 10 x 106 spermatozoa/ml tended to have low modal volumes (less than one-half the normal), but those above showed no particular trend.

Original languageEnglish
Pages (from-to)188-191
Number of pages4
JournalFertility and Sterility
Issue number2
StatePublished - 1978
Externally publishedYes


FundersFunder number
Joint Research Fund of the Hebrew University and Hadassah


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