To compare insertion failure rates for Pipelle endometrial sampling with a full bladder compared with the standard process (not taking into account bladder status) without cervical manipulation.

中文翻译：

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Pipelle 全膀胱子宫内膜取样与标准护理的比较：一项随机对照试验。

比较膀胱充盈情况下 Pipelle 子宫内膜取样的插入失败率与无宫颈操作的标准流程（不考虑膀胱状态）的情况。