Only the 13 C cohort, and not the 1 H cohort, showed significantly lower normal sperm morphology for the asthenozoospermic populations, see Table 1 (Supplementary Tables 8 and 9 for a per substrate breakdown). The 80N population had the highest proportion of motile sperm and there was a decreasing trend in percent motility 80N > 40N ≈ 80A > 40A in ejaculates used for both 1 H ( Fig. 2 ) and 13 C analysis ( Fig. 3 ).
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NMR spectroscopy of live human asthenozoospermic and normozoospermic sperm metabolism.
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