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that part of the fetus lying over the pelvic inlet; the presenting body part of the fetus. See also position and lie.
breech presentation presentation of the fetal buttocks, knees, or feet in labor; the feet may be alongside the buttocks (complete breech presentation); the legs may be extended against the trunk and the feet lying against the face (frank breech presentation); or one or both feet or knees may be prolapsed into the maternal vagina (incomplete breech presentation).
antigen presentation presentation of ingested antigens on the surface of macrophages near histocompatibility antigens; see also antigen presentation.
cephalic presentation presentation of any part of the fetal head in labor, whether the vertex, face, or brow.
compound presentation prolapse of one of the limbs of the fetus alongside the head in cephalic presentation or of one or both arms alongside a presenting breech at the beginning of labor.
footling presentation presentation of the fetus with one foot (single footling) or two feet (double footling) prolapsed into the maternal vagina.
funic presentation presentation of the umbilical cord in labor.
placental presentation placenta praevia.
shoulder presentation presentation with the fetal shoulder as the presenting part; see oblique lie and transverse lie.
transverse presentation transverse lie.
the condition in which the placenta is implanted in the lower segment of the uterus, extending to the margin of the internal os of the uterus or partially or completely obstructing the os.
Synonym(s): placental presentation
Etymology: L, placenta, flat cake, praesentare, to show
See placenta previa.
pla·cen·ta pre·vi·a(plă-sen'tă prē'vē-ă)
The condition in which the placenta is implanted in the lower segment of the uterus, extending to the margin of the internal os of the cervix or partially or completely obstructing the os.
Synonym(s): placental presentation.
Synonym(s): placental presentation.
presentation(pre?zen-ta'shun) [L. praesentatio]
1. In obstetrics, the position of the fetus presenting itself to the examining finger in the vagina or rectum (e.g., longitudinal or normal and transverse or pathologic presentation).
2. The relationship of the long axis of fetus to that of the mother; also called lie. See: illustration; position for table
3. The fetal body part that first enters the maternal pelvis. See: position for table
Fetal position in which the buttocks comes first. Breech presentation is of three types: complete breech, when the thighs of the fetus are flexed on the abdomen and the legs flexed upon the thighs; frank breech, when the legs of the fetus are extended over the anterior surface of the body; and footling, when a foot or feet present. Footling can be single, double, or, if the leg remains flexed, knee presentation.Synonym: pelvic presentation
Fetal position in which the brow or face of the infant comes first during labor, making vaginal delivery almost impossible. Cesarean section may be needed if the presentation cannot be altered.
Presentation of the head of the fetus in any position.
Fetal position in which a prolapsed limb is alongside the main presenting part.
Fetal position in which the head of the fetus is sharply extended so that the face comes first.
Fetal position in which the feet come first.See: breech presentation
Appearance of the umbilical cord during labor.
Presentation in which the long axis of the fetus is parallel to the long axis of the mother.
Presentation in which the long axis of the fetus is oblique to that of the mother.
pelvic presentationBreech presentation.
placental presentationPlacenta previa.
Presentation in which the shoulder of the fetus is the presenting part.
Presentation with the fetus lying crosswise.
Presentation of the upper and back part of the fetal head.