To evaluate the screening results for pre-eclampsia - eclampsia by mean artery blood pressure, PAPP-A and uterine artery doppler at 11 weeks 0 day to 13 weeks 6 days of gestation. The efficacy of low-dose aspirin prophylaxis in prevention of preeclampsia in high-risk pregnancy. | Summary of Medical Doctoral dissertation Screening for preeclampsia - eclampsia by uterine artery Doppler PAPP-A and the effect of prophylactic treatment