Marginal previa
A marginal placental previa (or grade 2 placenta previa) is a form of placenta previa where placental tissue reaches the margin of the internal cervical os, but does not cover it.
A marginal placental previa (or grade 2 placenta previa) is a form of placenta previa where placental tissue reaches the margin of the internal cervical os, but does not cover it.