inferior pelvic aperture

例句：

1. 1.The patient's lower pelvic aperture was enlarged due to the infection.
   由于感染，患者的下腹部开口变大了。
2. 2.During childbirth, the pelvic floor muscles must be strengthened to ensure proper support for the baby's head and prevent inferiour pelvic aperture.
   分娩期间，必须加强骨盆底肌肉以保障婴儿头部的正确支撑，防止下腹部开口。
3. 3. Inferiour pelvic aperture is a common cause of urinary incontinence in women.
   下腹部开口是女性尿失禁的常见原因。