Ovarian follicle count by magnetic resonance imaging is greater in adolescents and young adults with polycystic ovary syndrome than in controls

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VOLUME 3, ISSUE 2, P102-109, JUNE 01, 2022


Camila Freitas Pereira-Eshraghi, M.D., Rachel Tao, B.A., Codruta C. Chiuzan, Ph.D., Yuan Zhang, M.S., Wei Shen, M.D., Jodi P. Lerner, M.D., Sharon E. Oberfield, M.D., Aviva B. Sopher, M.D., M.S. 



To use magnetic resonance imaging (MRI) to quantify the follicle number per ovary (FNPO) using biplanar measurements and determine the ovarian volume (OV) using three-dimensional measurements in adolescents and young adults with polycystic ovary syndrome (PCOS) and controls and compare the differences between these groups; to examine the relationships between FNPO and OV and metabolic markers associated with PCOS; to compare OV obtained by use of MRI and ultrasound between young patients with PCOS and controls.


Cross-sectional study.


Outpatient within a major medical center in New York City.


Adolescent girls and young women aged 13–25 years with PCOS (n = 16) and body mass index–, age-, and ethnicity-comparable control subjects (n = 15).



Main Outcome Measures

The OV and FNPO by use of MRI, OV by use of transabdominal pelvic ultrasound, anthropometric measurements, and biochemical and hormonal evaluation.


The FNPO was higher in participants with PCOS (23.7 ± 4.6 follicles) than in controls (15.2 ± 4 follicles) when adjusted for menstrual age. The OV by use of ultrasound was higher in participants with PCOS (11.7 ± 5.6 mL) than in controls (8.1 ± 3.4 mL); however, OV by use of MRI did not differ between the groups. The OV by use of MRI and ultrasound correlated in participants with PCOS (r = 0.62) but not in controls.


Our results are in line with prior studies showing that FNPO may be a more sensitive measure of polycystic ovary morphology than OV. The results of this study support the use of ovarian k, a promising diagnostic tool for PCOS, in young patients.

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