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[Titer variations in the rheumatoid factor reaction during the menstrual cycle. A contribution on the problem of the value of serologic data].

Sixteen healthy women showed a high variability of their titres in the antistreptolysin reaction, in the antideoxyribonuclease B reaction and in three different tests for determination of the rheumatoid factor during their cycles of menstruation. Two men of the same age had a similar behavoir. Therefore serologic results may be difficult to interpret.