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。
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。
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