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Internal os diameter
What is normal internal os diameter? How  cervical incompetence related to internal os diameter, how diameter of internal os increases and when.
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It's between 1-5 mm but more than diameter it is the length of the cervix which is seen on ultrasound and can determine incompetence. It should be 2.5 cm or more.
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It is about cervical length
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Hi Cervical incompetence is related to decreased cervical length Cut off is 2.5 cm
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Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.