I believe my baby is ROA, but you talk about the importance of the baby being LOA. You claim that LOA is the best for chin tucking and moving through the pelvic outlet.

Your baby is Right Occiput Anterior. 

The back is to your right, and the baby is facing towards the roomy sciatic notch in the back left of your pelvis.

This position is not clearly associated with a resulting labor pattern.  The baby may rotate to the posterior and, if so, labor may have a posterior pattern of cluster contractions with slow downs or stalls. The baby may rotate to the anterior and labor may be straight forward. The main thing is whether the chin is tucked.

Variables with the ROA baby that effect labor;

1. Flexion of the chin
2. First time mom

3. Balance and tone of the soft tissues relating to birthing. (This means the uterus, ligaments, and fascia.)  

4. Pelvic alignment (This effects the above mentioned balance and tone.)
   
5. Pelvic shape and size
   
6. Placental location

Use the 3 Principles to give the ROA baby a chance to turn and face the back, right side and have their back on mother's left.

1. Relax the soft tissues so that the baby can move past the placenta during labor, if the placenta is anterior or on the left.
   
2. Use maternal positioning to help the baby come up a centimeter and turn their head around to face the right.

Notice if there are small wiggling parts near the front, lower half of the womb. Hands in front indicate a posterior baby. The LOP baby is often labeled ROA because the forehead of the LOP baby feels the same width as the nape of the ROA baby's neck.