Transvaginal ultrasonographic measurements of endometrial thickness: a reproducibility study

OBJECTIVE: The study was undertaken to assess the reproducibility of endometrial thickness measurements by transvaginal ultrasonography (TVS). METHODS: In a prospective blind study, two examiners measured the endometrial thickness of 25 patients by TVS on two separate occasions 30 minutes apart. RESULTS: The reliability test performed for each examiner was statistically less significant for the intra-observer variation of each observer (r = 0.95 and r = 0.93), than between both examiners (r = 0.85). Although there was no statistically significant difference between the observations, the mean range of observations was 2.12 + 1.27 mm. CONCLUSIONS: A safety margin of error should be taken into consideration while recommending a cutoff under which no curettage is needed.