宫颈短发生率近年在上升，那么宫颈短的诊断标准是什么呢?

　　The incidence of cervical shortness is on the rise in recent years, so what is the diagnostic standard of cervical shortness?

　　陈凤林教授指出：妊娠期无明显腹痛而B超测内口宽度>0.5cm,宫颈管长度<2.5cm,有助于宫颈松弛流产的诊断。

　　Professor Chen fenglin pointed out that: there was no obvious abdominal pain during pregnancy, but b-ultrasound was used to measure the width of the internal orifice (>, 0.5cm) and the length of the cervical canal (< 2.5cm), which was helpful for the diagnosis of cervical laxity and abortion.