What does -1 station during pregnancy mean?

Answer 1

When your Dr or Midwife tells you about your baby's station, he/she is referring to how far down the baby's head has come into your pelvis. If your baby has dropped, but has not yet settled into your pelvis to begin his/her decent, it is measured in centimeters as a negative station. This negative measurement goes from -3 to -1. Once your baby has settled into your pelvis, but before he/she starts his/her descent to the birth canal, it is referred to as a zero (0) station. Once your baby starts heading towards the cervix, it is referred to as a positive station from 1 to 3. During this time it is likely that you will feel an increase of pressure and pain in your pelvic bone and vaginal area.

Answer 2

It means the presenting part of the baby (head, shoulder, buttox) is 1cm above the ischial spine (a part of the maternal pelvis).