Thank you for your enquiry. As a woman gets closer to the birth, the carers begin to check if the baby’s head has engaged and how far it has descended into the pelvis. This is measured in fifths. It can be 4/5 into the brim (top of pelvis) or 4/5 above the brim. The further into the brim the further the baby’s head is into the pelvis.
<a href="http://www.nswmidwives.com.au/">NSW Midwives Association</a>
Note: This information is not designed to replace that of your health professional.