Before revision: Occipitoanterior occiput faces anteriorly (absolutely straight without any turning to any of the sides) Occipitoposterior occiput faces posteriorly (absolutely straight without any turning to any of the sides) Left occipitotransverse LOT occiput faces left Right occipitotransverse ROT occiput faces right Breech presentation with longitudinal lie: Left sacrum anterior (LSA)—the buttocks, as against the occiput of the vertex presentation, like close to the vagina (hence known as breech presentation), which like anteriorly and towards the left.
After revision: Occipitoanterior occiput faces anteriorly (absolutely straight without any turning to any of the sides) Occipitoposterior occiput faces posteriorly (absolutely straight without any turning to any of the sides) Left occipitotransverse LOT occiput faces left Right occipitotransverse ROT occiput faces right Breech presentation with longitudinal lie: Left sacrum anterior (LSA)—the buttocks, as against the occiput of the vertex presentation, lie close to the vagina (hence known as breech presentation), which like anteriorly and towards the left.