ROA fetal position refers to the fetal occipital part towards the right side of the pelvis is the right occipito-anterior position, ROA fetal position is a more specialized medical term, R stands for right, O stands for occipital, A stands for anterior, ROA stands for right occipito-anterior position, it refers to the position of the fetal previa part and the maternal pelvis. The fetal orientation is indicated by three aspects: if the representative bone is on the left or right side of the maternal pelvis, it is R or L; if the parietal previa represents the occipital bone, it is O; the breech position represents the sacrum, it is S; the chin is M; if the shoulder is the transverse scapula, it is Sc; this is the abbreviation in English. If the representative bone is in front of the pelvis, it is the anterior occipital position; if it is in the back, it is the posterior occipital position; if it is facing the transverse plane, it is the transverse position. The right occipito-anterior position is the one where the occiput faces the right side of the mother’s pelvis, which is also the more common fetal orientation and is the second choice of fetal orientation in normal delivery except for the left occipito-anterior position.