Trophoblastic cells in the blood stream in normal and abnormal pregnancy.
D000022:Abortion, Spontaneous; D001775:Blood Circulation; D005260:Female; D006801:Humans; D008431:Maternal-Fetal Exchange; D008722:Methods; D010920:Placenta; D011247:Pregnancy; D011248:Pregnancy Complications; D011274:Pregnancy, Tubal; D014327:Trophoblasts / Q000166:cytology*; D014599:Uterus