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The period of intrauterine development of the inner, middle and outer ear begins with the 7-8 weeks and ends at 6-8 months of pregnancy. The expectant mother, faced with a diagnosis of Microtia and atresia of the auditory canal must pass all phases of screening. At the first screening (11-14) weeks, you can see the beginnings of the auricle, however, to see the ear canal is very difficult. To see the ear canal need to undergo multiple ultrasound that are not very favorable to do. The average number of ultrasonography in the normal range, it is 3-5 times. The photo shows the development dynamics of the auditory canal and the auricle during pregnancy. Expectant mothers, please pay great attention to screening ear!