AMH as Predictor of Premature Ovarian Insufficiency: A Longitudinal Study of 120 Turner Syndrome Patients.

CONTEXT

The majority of Turner syndrome (TS) patients suffer from accelerated loss of primordial follicles. Low circulating levels of anti-Müllerian hormone (AMH) may predict the lack of spontaneous puberty in prepubertal girls and imminent premature ovarian insufficiency (POI) in TS women with preserved ovarian function.

OBJECTIVES

To evaluate the association between circulating AMH and ovarian status in TS patients.

DESIGN

Longitudinal observational cohort study.

SETTING

Tertiary referral center for pediatric and gynecologic endocrinology.

PARTICIPANTS

A total of 120 TS patients, aged 0 to 48 years.

MAIN OUTCOME MEASURES

Longitudinal measurements of AMH, FSH, LH, estradiol, and inhibin B according to age, karyotype (45,X; 45,X/46,XX mosaicism; miscellaneous karyotypes), and ovarian status (group 0, prepubertal; group 1, never ovarian function; group 2, ongoing ovarian function; and group 3, loss of ovarian function).

RESULTS

Ovarian status was highly associated with the TS karyotype: spontaneous puberty—45,X (three of 44 patients), 45,X/46,XX (15 of 17), miscellaneous (17 of 42); and POI—45,X (three of three), 45,X/46,XX (one of 15), and miscellaneous (eight of 17). AMH was associated with ovarian status (eg, group 1, <2 pmol/L; vs group 2, 19 pmol/L; P < .001). AMH < 4 pmol/L (corresponding to <-2 SD) predicted absent puberty in prepubertal girls and POI in adolescent and adult patients.

CONCLUSION

The majority of women with mosaic karyotype 45,X/46,XX had ongoing ovarian function in early adulthood. AMH < -2 SD predicted failure to enter puberty in young TS girls and imminent POI in adolescent and adult TS patients.