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Fig. 1 | BMC Women's Health

Fig. 1

From: Anal incontinence and unrecognized anal sphincter injuries after vaginal delivery– a cross-sectional study in Norway

Fig. 1

Photograph of endoanal ultrasonography image from the mid anal canal. The hyperechoic outer circle is the external anal sphincter, and a defect is visible from the 9 o’clock position to the 3 o’clock position. The hypoechoic inner circle is the internal anal sphincter, and a defect is visible from the 11 o’clock position to the 4 o’clock position. Arrows point to each of the sphincters

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