The aim of the study was to analyse the correlation between placental vascularisation indices in second and third trimester, histological findings of placentas, and adverse pregnancy outcome rates in case of pregnancy hypertension. 3D volume files were created, and analysed over placentas with the help of VOCAL and 3-DPD indices, such as vascularisation index (VI), flow index (FI) and vascularisation flow index (VFI) were measured, in pregnancies complicated with chronic hypertension (CHT) N=15, gestational hypertension (GHT) N=16, and pre-eclampsia (PE) N=13. We analysed the correlation between the above mentioned indices, the severity of pathohistological findings and adverse pregnancy outcome rates. Placental vascularisation indices showed significant differences between groups examined. Especially FI showed good correlation between pregnancy pathology, histological findings and adverse pregnancy outcome rates. All PE pregnancies ended up with Caesarean section, 1 minute apgar was significantly lower in this group compared to both GHT and CHT groups, and more than half (7/13) of the deliveries were preterm in case of PE. Twenty percent of CHT placentas were hypovascularised, more than two-third of GHT placentas showed hypovascularisation, and all placentas were hypovascularised in the PE group. Severe interstitial fibrosis, explicit intervillous and perivillous fibrin deposits and intermediate or explicit number of syncytial knots were found only in PE placentas. We found accelerated ripening in one-third of CHT, half of GHT and all of PE placentas. All PE cases were IUGR (Intrauterine Growth Restriction) and progrediated from GHT. We found strong correlations between placental vascularisation indices, severity of pathohistological findings of placentas, and the rate of adverse pregnancy outcomes in case of pregnancy hypertension.