internal pelvimeter

例句：

1. 1. The doctor used an internal pelvimeter to measure the baby's growth.
   医生使用内测骨盆计来测量婴儿的生长。
2. 2. During labor, the nurse used an internal pelvimeter to monitor the baby's heart rate.
   在分娩期间，护士使用内测骨盆计来监测宝宝的心率。
3. 3. The researcher used an internal pelvimeter to study the relationship between maternal age and childbirth outcomes.
   研究者使用内测骨盆计来研究母亲年龄与分娩结果之间的关系。