| In fact they are most often iatrogenic, after voluntary tubal ligation or segmentary resection of the tube for ectopic pregnancy. |
| In Somali society, the segmentary lineage system allows subdivisions of six or more levels of identity, with migration decisions often taken at the sixth level. |
| Unconstrained by male segmentary politics, their differential affinity blurred lines of emnity, producing the prospect of continuing reconciliation. |
| In contrast, the Humr Baqqārah had a political system based on a segmentary lineage organization. |
| The tribal segmentary system thus fosters an ethic of egalitarianism with its expression found in the members of the corporate patrilineal descent groups. |
| These so-called segmentary systems are organised around a principle of opposition. |
