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Perineal echotomography is a method for measuring the dilatation of the cervix and is a good measure of the cervix during pregnancy. It permits visualization of the bag of waters, the presentation of the fetus and of the low-lying placenta.
会阴超声断层扫描是一种测量宫颈扩张的方法,是孕期测量宫颈的一种好方法。它可以显示羊水囊、胎儿先露情况和前置胎盘。