For females, there were no significant differences in deferral rates if 15 weeks had elapsed since the last donation, but there were highly significant differences between weeks 8 and 14.
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Blood donation, blood supply, iron deficiency and anemia - it is time to shift attention back to donor health.
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The sentences
It is noteworthy that over time with successive donations the Hb decreased as well, such that the proportion of female donors with values below 12.5 g/dL, increased from 11% to 25%, while the men has a trend toward significance, with an increase from 1% to 5%.