The placenta is a unique organ, short lived by design. Its existence is vital for the persistence of human embryo/foetus in the intra uterine environment. Structural and functional derangement of placenta arouses a considerable interest, as this may be the only index to measure adequacy of the foetal environment. Hypertensive disorders generating complications during pregnancy (Toxaemia of pregnancy) which are common and forming deadly characters along with haemorrhage and infection. Maternal hypertension (toxaemia of pregnancy) is diagnosed in 6–10% of all deliveries which is related with 22% of perinatal foetal deaths and 30% of maternal death. The present study has done in 100 pregnant mothers, divided into four groups 20 cases of mild preeclampsia, 20 cases of severe preeclampsia, 20 cases of Eclampsia, 40 cases of control (Normotensive) pregnant women admitted in Department of Obs and Gynae, Rama Medical College, hospital and research Centre, Mandhana, Kanpur, U.P(India). The placentae were weighed with a standard weighing machine. The fetal weight was noted from the case records provided. In this present study the mean placental, birth weights were low in different grades of toxemia of pregnancy when compared with control group. The fetoplacental weight ratio was higher in cases of mild and severe preeclampsia when compared with control group but the difference is insignificant.