The syncytial knot: a sign of active syncytial proliferation.
D005321:Extraembryonic Membranes / Q000032:analysis*; D005260:Female; D006801:Humans; D008853:Microscopy; D008858:Microscopy, Phase-Contrast; D010920:Placenta / Q000032:analysis* / Q000473:pathology*; D011225:Pre-Eclampsia / Q000473:pathology*; D011247:Pregnancy; D014327:Trophoblasts / Q000032:analysis