In this study, 134 pregnancy maternal serum of the third trimester gestation were determined their P -hCG, SP1,hPL level, to probe into the value of this three hormones in judging the placental function and the fetal prognosis. The results show that in the moderate and severe preeclampsia group, low birth weight group, the level of P -hCG is notable high, while the sp, and hPL levies are low (P |