Rujukan: Diagnosis of weakness cervical can be challenging and is based on a history of painless cervical dilation usually after the first trimester without contractions or labor and in the absence of other clear pathology. Salian ti sajarah, sababaraha panyadia ngagunakeun assessment of cervical length in second trimester to identify cervical shortening using ultrasound. Tapi, panjang cervical pondok geus sabenerna geus ditémbongkeun janten marker of kalahiran prématur tinimbang lemah cervical. tés diagnostik séjén nu geus ngusulkeun nu teu geus disahkeun di antarana hysterosalpingography jeung radiographic imaging of balon traction on cervix, assessment of the patulous cervix with Hegar or Pratt dilators, the use of a balloon resistance test, and the use of cervical dilators to calculate a cervical dilatory index.
kurang ti 25 mm