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。

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It did so indeed, and much sooner than she had expected: before she had drunk half the bottle, she found her head pressing against the ceiling, and had to stoop to save her neck from being broken.

小瓶真的照办了，而且比她期望的还快。她还没有喝到一半，头已经碰到了天花板，因此，必须立即停止，不能再喝了！

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Be sure not to lean your head forward or "turtle neck" when pressing shoulder blades together.

记住，当你拉扯肩胛骨时千万不要将头前倾或是做出像乌龟脖子一样的姿势。

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