Pre-Eclampsia/immunology; Receptors, Antigen, T-Cell, gamma-delta/metabolism; T-Lymphocyte Subsets/metabolism; T-Lymphocytes, Regulatory/metabolism; Adult; Apoptosis/immunology; Disease Progression; Female; Gene Expression Regulation; Hepatitis A Virus Cellular Receptor 2; Humans; Immunophenotyping; Inflammation; Interferon-gamma/metabolism; Lymphocyte Activation; Membrane Proteins/genetics; Membrane Proteins/immunology; Membrane Proteins/metabolism; NK Cell Lectin-Like Receptor Subfamily C/genetics; NK Cell Lectin-Like Receptor Subfamily C/immunology; NK Cell Lectin-Like Receptor Subfamily C/metabolism; Perforin/genetics; Perforin/immunology; Perforin/metabolism; Pre-Eclampsia/pathology; Pre-Eclampsia/physiopathology; Pregnancy; Receptors, Antigen, T-Cell, gamma-delta/immunology; T-Lymphocyte Subsets/immunology; T-Lymphocyte Subsets/pathology; T-Lymphocytes, Regulatory/immunology; T-Lymphocytes, Regulatory/pathology; fas Receptor/genetics; fas Receptor/immunology; fas Receptor/metabolism