station
The position of the fetal presenting part in relation to the maternal ischial spines during labor.
Full Definition
Station describes the level of the fetal presenting part (usually the head) in relation to the maternal ischial spines during labor and delivery. It is measured in centimeters above or below the spines, typically ranging from -5 to +5. A station of 0 indicates that the presenting part is at the level of the ischial spines. Negative numbers indicate the presenting part is above the spines (higher in the pelvis), while positive numbers indicate it is below the spines (lower in the pelvis). Station +5 typically indicates crowning or delivery.
Usage
Usage note: Expressed with + or - signs; negative values indicate higher position, positive values lower position.
In Context
- "The fetal head was at -2 station with vertex presentation." — labor progress notes
- "Station advanced from 0 to +3 over the past two hours of pushing." — second stage labor documentation