The video explains umbilical cord abnormalities in a precise manner. One must watch this video to get a basic idea of umbilical cord abnormalities. TIMELINE: 0:08 Cord abnormalities 0:09 Battledore placenta 0:28 Velamentous placenta 1:03 Abnormal length 1:21 Clinical significance of abnormal length 1:58 True knot 2:12 False knots 2:27 Single umbilical artery