<obstetrics> The anatomic positioning of the placenta over the cervical os (opening to the birth canal). This is an important cause of painless third trimester bleeding in the pregnant female. Many cases of placenta previa will require cesarean section delivery. ... (31 Dec 1997) ... 
(plә-sen´tә pre´ve-ә) low implantation of the placenta so that it partially or completely covers the internal ostium of the uterus; this occurs more often in women who have had multiple pregnancies or are over 35. The exact cause is not known. With the onset of any contractions and cervical dilat...
A condition in which the placenta
Type: Term Definitions: 1. 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. Synonyms: placental presentation
A condition in which the placenta partially or completely covers the cervix, hindering vaginal delivery.
A complication found in some pregnancies in which the placenta implants fully or partially over the cervix. In most pregnancies, the placenta implants itself in the upper portion of the uterus. However, placenta previa occurs when the placenta implants itself over all or some of the cervix. This usually occurs during the second or third trimester.....
[n] - pregnancy in which the placenta is implanted in the lower part of the uterus (instead of the upper part)
noun pregnancy in which the placenta is implanted in the lower part of the uterus (instead of the upper part); can cause bleeding late in pregnancy; delivery by cesarean section may be necessary
A condition in which the placenta lies very low in the uterus so that the opening of the uterus is partially or completely covered; may require a C-section
Low attachment of the placenta, very close to or covering the cervix.
Low attachment of the placenta, very close to or covering the cervix.
Condition in which the placenta is implanted in the lower segment of the uterus and covers the cervical opening, partly or completely.
A condition in which the placenta partially or completely covers the cervix, hindering vaginal delivery.
placenta is attached close to or covering the cervix (opening into the uterus).
A condition in which the placenta attaches too low in the uterus, fully or partially covering the cervix. The condition can cause bleeding during pregnancy or make vaginal delivery impossible.