Table 1.
Study schedule.
Table 2.
Procedures at each visit.
Fig 1.
System components: Control unit including control unit console, power supply (not shown), foot switch, connector cable and single-use probe.
From the Instructions for Use of the Pregnolia System (www.pregnolia.com/instructions).
Fig 2.
General overview of the method and application.
The probe is manually placed on the cervix during a routine gynaecological evaluation, with the aid of a speculum. Adapted from [20].
Fig 3.
From [25].
Fig 4.
Flowchart summarizing the distribution of subjects in the study.
sPTB = spontaneous preterm birth.