Abstract
Individual variations in the size and shape of the human uterus are probably greater than variations in the size and shape of the human foot. It is, therefore, unfortunate that, whereas individual fitting of shoes is an accepted custom, selective fitting of IUDs is not. Furthermore, the current method of selecting IUD size, on the basis of bimanual pelvic examination and sounding of the uterus for total axial dimension, is grossly inadequate. Estimating external uterine size does not give an indication of the internal dimensions of the endometrial cavity (Wittman and Chow 1976; Tejuja and Malkani 1969), and measuring total uterine length is not useful in identifying endometrial cavity length (Hasson 1976; Wittman and Chow 1976). As IUDs are normally placed in the endometrial cavity exclusive of the cervical canal, knowledge of cervical length is essential for the proper placement of an IUD above the cervix; knowledge of endometrial cavity dimensions is necessary for proper fitting of the device.
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Hasson, H.M. (1980). Uterine Geometry and IUD Performance. In: Hafez, E.S.E., Van Os, W.A.A. (eds) Medicated Intrauterine Devices. Developments in Obstetrics and Gynecology, vol 5. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-8872-9_2
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DOI: https://doi.org/10.1007/978-94-009-8872-9_2
Publisher Name: Springer, Dordrecht
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