Technically, back labor occurs when the fetus is in a posterior position, with its face up and the back of its head pressing against your sacrum, or the back of your pelvis.
从技术上来说，背阵痛发生在胎儿处于背对的位置，它的脸朝上而后脑勺紧靠你的骶骨或者骨盆后方。
Assessment of the fetus consists of estimating fetal weight and position. Estimations of fetal size, even those obtained by ultrasonography, are frequently inaccurate.
评价胎儿包括胎儿体重和位置。对胎儿大小的估计，即使是超声学获得的结果经常都不准确。
The symptom comparison relaxes the polyhydramnios the pregnant woman, Chang Jingfa pregnants inspires hypertension disease and the position of the fetus is unusual.
症状比较缓和羊水过多的孕妇，常井发妊振高血压疾病和胎位异常。
The position of the fetus are exceptionally many when the gestation period inspection was discovered.
胎位异常多在孕期检查时被发现。
No wonder 4D ultrasound is so popular with parents-to-be. But it is also a serious diagnostic tool for doctors assessing the health and position of the fetus.
没有奇迹4D超声是如此受欢迎，是父母。但它也是一个严重的诊断工具，为医生评估的健康和胎儿的位置。
The main causes in sequence were abnormal position of the fetus, asphyxia, monstrum, premature labor, and pathological pregnancy.
围产儿主要死因顺序为胎位异常，窒息，畸形，早产和病理妊娠等。
In the baby still in changing in thirty-seven weeks after the posture, is the position of the fetus not fixed.
宝宝在三十七周后仍不断地变换姿势，就是胎位不固定。
Because it produces no radiation, ultrasound is sometimes used during pregnancy to determine the size and position of the fetus.
由于无放射性，超声波有时被用于妊娠期的妇女，以确定胎儿的位置及大小。
Because it produces no radiation, ultrasound is sometimes used during pregnancy to determine the size and position of the fetus.
由于无放射性，超声波有时被用于妊娠期的妇女，以确定胎儿的位置及大小。
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