The immunotherapy during in vitro fertilization and embryo transfer cycles in infertile patients with endometriosis

Abstract

Objective: To investigate if the immunotherapy with corticosteroids would improve the pregnancy rate in infertile patients with endometriosis who undergo in vitro fertilization and embryo transfer (IVF-ET).

Methods: Forty-two infertile patients with endometriosis plus tubal factor and 87 pure tubal infertility patients who underwent IVF-ET in our unit were allocated randomly to the corticosteroid treatment group and the control group.

Results: The prevalence of autoantibodies (antinuclear antibody, lupus anticoagulant, anticardiolipin antibody, rheumatoid factor) was elevated significantly in patients with endometriosis plus tubal factor compared with pure tubal infertility patients (38.1% vs 2.3%). Twenty-one patients with endometriosis plus tubal factor underwent 54 cycles of IVF-ET, receiving corticosteroids. Forty-three patients with pure tubal factor underwent 81 cycles of IVF-ET, receiving corticosteroids. Twenty-one patients with endometriosis plus tubal factor who underwent 57 cycles of IVF-ET and 44 patients with pure tubal factor who underwent 84 cycles of IVF-ET served as controls, not receiving corticosteroids. In patients with endometriosis plus tubal factor, there was a significantly higher clinical pregnancy rate per cycle in the treatment group, with 42.6% (23/54) compared with 22.8% (13/57) in the control group but no differences between 2 groups in spontaneous abortion rate (21.7% vs 15.4%) and multiple pregnancy rate (17.4% vs 15.4%). In patients with pure tubal infertility, there were no significant differences between the treatment group and control group in clinical pregnancy rate (40.7% vs 34.5%), spontaneous abortion rate (12.1% vs 10.3%) or multiple pregnancy rate (18.2% vs 10.3%). In the endometriosis plus tubal infertility group with autoantibodies, the clinical pregnancy rate per cycle was significantly higher in the treatment group at 40.9% compared with 14.8% in the control group. In endometriosis plus tubal infertility group without autoantibodies, there was no significant difference between 2 groups with respect to the clinical pregnancy rate per cycle (43.8% vs 30.0%).

Conclusions: This study suggests that immunotherapy with corticosteroids could improve the clinical pregnancy rate in endometriosis patients undergoing IVF-ET and may be more effective in patients with positive autoantibodies.