الفهرس 
Recurrent Pregnancy LossOnly 14 pages are availabe for public view
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Abstract
Sufficient uteroplacental blood flow is essential for normal pregnancy outcome and is accomplished by the coordinated growth and remodeling of the entire uterine circulation, as well as the creation of a new fetal vascular organ; the placenta. The process of remodeling involves a number of cellular processes, including hyperplasia and hypertrophy, rearrangement of existing elements, and changes in extracellular matrix. This review describes the current use of Doppler ultrasound to examine blood flow in the uterus and ovaries in infertile patients and during early pregnancy. The aim of this study was to evaluate and compare the resistance to blood flow in the uterine arteries of women with and without history of unexplained RPL with the use of pulsed Doppler ultrasonography, as well as to correlate these observations with other parameters associated with endometrial vascularity and receptivity, like age and endometrial thickness. This study was conducted in Tanta university hospital (outpatient clinic for RPL) during the period between January2014 and October 2014, Forty nonpregnant patients with a history of three or more consecutive unexplained 1st- and 2nd-trimester miscarriages before 20 weeks were examined by transvaginal ultrasound in the mid luteal phase for measuring the endometrial thickness , also Doppler ultrasound will be done at the same period of the menstrual cycles for evaluating uterine perfusion and in turn endometrial receptivity by measuring.