What is the true follicular diameter: an assessment of the reproducibility of transvaginal ultrasound monitoring in stimulated cycles

Automated assessment of ovarian follicles using a novel three-dimensional ultrasound software

“…The maximum error in volume measurement of 0.02 cc by the SonoAVC would correlate to an error of 0.337 mm in MFD. This error is extremely small and much less than the error observed with the standard method of follicular assessment (4).…”

“…This method is also inexact, with significant interobserver and intraobserver variability (4). Forman et al (4) calculated that the 95% confidence interval (CI) for a follicle measured as 15 mm in MFD is 13-17 mm. In addition, if the same follicle is measured by multiple observers the 95% CI is 12-18 mm.…”

Manipulation of Human Ovarian Function: Physiological Concepts and Clinical Consequences*

“…Follicle size assessed by ultrasound has been compared with follicle volume as determined by the amount of fluid collected after puncture (182), or with follicle size during laparoscopy (190). Interobserver variability has been shown to be limited (200). Timing of ovulation could be predicted using ultrasound (180,186,187,193), and the mean size of the preovulatory follicle reported in various studies ranged between 20 and 27 mm (201).…”

Manipulation of Human Ovarian Function: Physiological Concepts and Clinical Consequences

“…Follicle size assessed by ultrasound has been compared with follicle volume as determined by the amount of fluid collected after puncture (182), or with follicle size during laparoscopy (190). Interobserver variability has been shown to be limited (200). Timing of ovulation could be predicted using ultrasound (180,186,187,193), and the mean size of the preovulatory follicle reported in various studies ranged between 20 and 27 mm (201).…”