Beijingan expert Professor Chenfenglin pointed out: B Super is difficult to see cervical insufficiency before pregnancy, unless it is particularly serious. After pregnancy, most people can assess whether there is cervical insufficiency through B Super. However, a small number of patients are also without warning.
Under normal circumstances, the normal length of the cervical tube is 2.5-3cm. When used as a gynecological examination, the cervix can successfully pass through the No. 7 dilation stick, or there is no obvious abdominal pain during pregnancy and the width of the B supermeasured inner mouth is & GT; 0.5 cm, cervical tube length & lt; 2.5 cm, helpful for the diagnosis of cervical relaxation abortion.