The effect of endometriosis on the antimüllerian hormone level in the infertile population.

Purpose: To determine whether the presence of endometriosis in infertile women without prior ovarian surgery influences markers of ovarian reserve, AMH and FSH.
Methods: A retrospective cohort study included three groups of women who presented for IVF treatment at our tertiary care center from 04/27/2015 to 05/31/2017: women with endometriosis and prior ovarian surgery (EnSx), women with endometriosis without prior ovarian surgery (En), and women with a primary diagnosis of male factor infertility (MF; reference group).
Results: There were 671 patients that met inclusion criteria (78 EnSx, 60 En, and 533 MF). Compared to the MF group (3.6 ± 3.0), a lower mean AMH level (ng/mL) was observed in the EnSx group (2.5 ± 2.5; aβ - 1.21; 95% CI [- 1.79, -0.62]) and in the En group (2.5 ± 2.2; aβ - 1.11; 95% CI [- 1.68, - 0.54]). Both endometriosis groups had a statistically significantly higher proportion of patients with an AMH < 1 (EnSx, 24.4%; OR, 2.39 [95% CI, 1.31, 4.36]; En, 28.3%; OR, 2.67 [95% CI, 1.41, 5.08]) compared to the MF group (13.9%). The mean baseline FSH level (lU/L) was statistically significantly higher in both endometriosis groups (EnSx, 8.6 ± 4.3; β, 1.37 [95% CI, 0.39, 2.34]; En, 8.4 ± 3.7; β, 0.96 [95% CI, 0.04, 1.87]) compared to the MF group (7.3 ± 2.2).
Conclusions: Among infertility patients with endometriosis, with and without a history of ovarian surgery, ovarian reserve markers were worse (lower AMH and higher FSH) and a higher proportion had decreased ovarian reserve as measured by AMH compared to women with MF.