Fig. 3From: Association between endometrial indoleamine 2,3-dioxygenase expression level and pregnancy outcomes in women undergoing first in vitro fertilization treatmentComparison of endometrial IDO expression between different groups. a The statistical chart showing the expression level of IDO in endometrium between the non-pregnant group (n = 50) and pregnant group (n = 90). b The statistical chart showing the expression level of IDO in endometrium between the non-live birth group (n = 60) and live birth group (n = 80). *P < 0.05, Mann-Whitney U testBack to article page