ESTRIOL IS ONE OF THE THREE MAIN ESTROGENS PRODUCE BY THE HUMAN BODY, IT'S A FEMALE SEX STEROID HORMONE LARGELY ASSOCIATED WITH PREGNANCY. ESTRIOL BLOOD TEST IS USED TO EVALUATE FETAL DISTRESS AND PLACENTAL FUNCTION IN THE MANAGEMENT OF WOMEN FACING COMPLICATIONS SUCH AS “PREECLAMPSIA, FETAL GROWTH RETARDATION, DIABETES,CHORIOCARCINOMA, HYDATIDIFORM MOLE(ABNORMAL CLUSTER OF CELLS).