(a)
(b)
(c)
(d)
Figure 1: Cell proliferation inhibited by LNG. The MTT cell growth curve was performed to investigate the effects of the treatments on the proliferation of human endometrial stromal cells (HESCs) and glandular cells (HEGCs) treated with LNG, with 5 × 10−5 mol/L E2 as the opposite control and DMSO (0.5%) as the blank control. (a) The inhibition rate (IR) of the HESCs treated with LNG in various concentrations in a time course manner (24 hs, 48 hs, and 72 hs); (b) MTT cell growth curve of HESCs treated with 5 × 10−5 mol/L LNG in a time course manner. (c) IR of the HEGCs treated with LNG in various concentrations in a time course manner; (d) MTT cell growth curve of HEGCs treated with  mol/L LNG in a time course manner; ; there was a significant difference. Each experiment was repeated for 20 patients.