TY - BOOK AU - Rehab Lotfy Mohammed AU - Hassan Mostafa Gaafar , AU - Khaled Rasheed Mohammed Hussein , TI - Color - doppler study of corpus luteum and uterine arteries in association with maternal serum CA - 125 level in prognosis of first trimesteric threatened abortion / PY - 2011/// CY - Cairo : PB - Rehab Lotfy Mohammed , KW - Color - doppler KW - Threatened abortion KW - Uterine arteries N1 - Thesis (Ph.D.) - Cairo University - Faculty of Medicine - Department of Gynecology and Obstetrics; Issued also as CD N2 - Loss of pregnancy is a distressing problem for both the patient and physician . Not all conceptions result in live birth of the infant and most of pregnancy losses are not diagnosed, approximately 70 % of human conceptions fail to achieve viability and an estimated 50 % are lost before the first missed period ER -