Figure 3.

Frequency of trophoblast cells in cervical samples. Cervical specimens collected from non-pregnant women (n = 7) or pregnant women with a normal intrauterine pregnancy (IUP; n = 37), ectopic pregnancy (EP; n = 10) or blighted ovum (BO; n = 5) were labeled with antibody to HLA-G and counterstained with hematoxylin. The number of trophoblast cells per total cervical cells (trophoblast frequency) was determined and the means with SE (error bars) are shown for each group. Bars labeled with different letters are significantly different (P < 0.05).