Migration of pbNK cells from pregnant women, nonpregnant women, or male donors through DECs. Highly purified pbNK cells isolated either from first-trimester pregnant women (A) or male donors (B) or nonpregnant women (C) were assayed for their ability to migrate through a monolayer of primary cultures of DECs using different concentrations of CXCL12/SDF-1, CX3CL1/fractalkine, or CXCL10/IP-10 as chemoattractants. Data are expressed as the mean plus SD of the percentage of migrated cells obtained from 4 independent experiments. *P < .05, as evaluated by comparing chemoattractant- versus control medium (C)–induced migration by Student t test.