
Keywords: ABCG2; ATP binding cassette subfamily G member 2; CPF; chlorpyrifos; hCG; human chorionic gonadotrophin; MDR1; multi-drug resistance 1 gene; OP; Organophosphate; P-gp; P-glycoprotein 1; PSG; pregnancy specific glycoprotein; STB; syncytiotrophoblast; vCTB;