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Utility of the sperm chromatin structure assay as a diagnostic and prognostic tool in the human fertility clinic

Open access
Evenson, D.P.·1999·Human Reproduction

Abstract

The sperm chromatin structure assay (SCSA) was used to measure over 500 human semen samples from two independent studies: Study I, 402 samples from 165 presumably fertile couples wishing to achieve pregnancy over 12 menstrual cycles; Study II, samples from 115 patients seeking fertility counselling. The SCSA measures susceptibility to DNA denaturation in situ in spermatozoa exposed to acid for 30 s, followed by acridine orange staining. SCSA data from the male partners of 73 couples (group 1) achieving pregnancy during months 1-3 of Study I were used as the standard of 'sperm chromatin compatible with high fertility' and were significantly different from those of 40 couples (group 3) achieving pregnancy in months 4-12 (P < 0.01) and those of male partners of 31 couples (group 4) not achieving pregnancy (P < 0.001). Group 2 contained couples who had a miscarriage. SCSA values for Study II were almost twice that of the Study I fertility standards. Within-couple repeatability tended to be less for group 3 than for groups 1, 2 or 4. Based on logistic regression, spermatozoa with denatured DNA (cells outside the main population, COMP alpha t) were the best predictor for whether a couple would not achieve pregnancy. Some 84% of males in group 1 had COMP alpha t < 15%, while no couples achieved pregnancy in group 1 with > or = 30% COMP alpha t, a threshold level considered not compatible with good fertility. Using selected cut-off values for chromatin integrity, the SCSA data predicted seven of 18 miscarriages (39%).

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Metadata

Authors
Evenson, D. P.
Venue
Human Reproduction
Published
1999-04-01
Volume
14
Issue
4
Pages
1039-1049
ISSN
  • 0268-1161 (ISSN-L)
  • 1460-2350
OpenAlex
W2109269254
Cited by
1,121
References
29
FWCI
22.65
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Utility of the sperm chromatin structure assay as a diagnostic and prognostic tool in the human fertility clinic. https://app.cochat.ai/papers/10.1093/humrep/14.4.1039
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Evenson, D. P. (1999). Utility of the sperm chromatin structure assay as a diagnostic and prognostic tool in the human fertility clinic. Human Reproduction. https://doi.org/10.1093/humrep/14.4.1039

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