What is the meaning of10a?

Patient's question:

No

Doctor's answer:

LOA is the abbreviation for the position of the fetus. It is one of the normal fetal positions, which includes:
1) Representing the side of the bone in the pelvis, either left (L) or right (R).
2) Representing the name of the bone, such as:
- Vertex presentation () is represented as "O" ().
- Breech presentation () is represented as "S" ().
- Face presentation () is represented as "M" ().
- Shoulder presentation () is represented as "Sc" ().
3) Representing the anterior, posterior, or transverse position of the bone in the pelvis. For example, in vertex presentation, if the occiput is on the left side of the pelvis and facing forward, the fetal position is left occiput anterior (LOA), which is the most common position.
LOA describes the fetal lie, indicating a left occiput anterior position, which is a normal fetal position.