sacroposterior position

sa·cro·pos·te·ri·or po·si·tion (SP),

a breech presentation of the fetus with the sacrum next to maternal sacrum or rotated pointing to the right (right sacroposterior, RSP) or to the left (left sacroposterior, LSP) sacroiliac articulation of the mother.

sa·cro·pos·te·ri·or po·si·tion

(SP) (sā'krō-pos-tēr'ē-ŏr pŏ-zish'ŏn)
A breech presentation of the fetus with the sacrum pointing to the right (right sacroposterior, RSP) or to the left (left sacroposterior, LSP) sacroiliac articulation of the mother.
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