leiden mutation is activated protein C resistance with hypercoagulable states and increased thrombotic risk. 99 % are heterozygous and 1 % is homozygous , very rare cases are psoudohomozygous with factor V deficiency. relation to this mutation was studied in severe preeclamptic patients. doppler indices of uterine arteries , increased pulsetility index or unilateral or bilateral uterine artery notch and placental pathology were studied.
