dorsal umbilicus

例句：

1. 1.The baby's dorsal umbilical cord is still attached to the placenta.
   宝宝的腹侧脐带仍然连接到胎盘上。
2. 2. During labor, doctors often need to access the dorsal umbilical vein for blood sampling.
   在分娩过程中，医生经常需要通过腹侧脐静脉进行采血。
3. 3.After birth, the dorsal umbilical stump will close naturally.
   出生后，腹侧脐带的残端会自然闭合。