PGF and immune system disorder: The significant difference between Group B and Group C, Group B and Group D strengthened the basis for clinical practice that sFlt-1/PlGF, PlGF, PlGF%, and sFlt-1 can effectively distinguish preeclampsia from pregnancy complicated with hypertension, diabetes, immune diseases, chronic kidney diseases, and those will deliver low birth weight/ small-for-gestational age neonates.