Correct spelling for R.O.A.

Medical definition of R.O.A.:

Abbreviation of right occipitoanterior presentation, the occiput of the fetus being turned toward the right acetabulum of the mother.

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A method of diagnosis of pregnancy: with the tip of the forefinger in the vagina, a sharp tap is made against the lower segment of the uterus; the embryo, if present, is tossed upward, and if the finger is retained in place will presently be felt to strike against the wall of the uterus as it falls back. ...