placenta previa. 前置胎盘. 胎盘. 宫体. 宫颈. definition.
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The normal placenta attaches to the anterior. Posterior or lateral wall of the uterine body . If it is attaches to the lower segment of the uterus, over the cervical os, lower than fetal presentation, it is called placenta previa.
(all the 3rd trimester) repeated
(cervical polyps; erosion or
carcinoma of cervix ; cervicitis)
rupture of marginal sinus
rupture of vasa previa
A indication : <37w
bleeding is little in amount
B methods: hospitalization
to correct anemia
inhibiting to uterine contraction
improving maturity of fetal lungs