An example of normal placental placement high on uterine wall. Uterus and cervix in sagittal section (top) and schematically from below (bottom).

Four examples of placental placement within uterus, shown as cross-sections (top) and schematically from below (bottom). Normal placenta (far left), low implantation (left), partial placenta previa (right), total placenta previa (far right).

Pelvic relaxation, normal