Regulatory Τ-cell differentiation between maternal and cord blood samples in pregnancies with spontaneous vaginal delivery and with elective cesarian section.

Problem: The immunological mechanisms preventing fetal antigenic rejection during normal pregnancy and the extent to which the type of delivery influences lymphocyte reactions are elusive.

Method Of Study: Maternal peripheral blood and neonatal umbilical cord blood (CB) was collected upon labor after vaginal delivery or cesarian section. Leukocytes were analyzed with flow cytometry, focusing on regulatory and γ/δ T-cells.