Pregnolia has developed a medical device for the improvement of pregnancy care. The device is the result of several years of academic research at ETH Zürich and University Hospital Zürich and allows to measure cervical stiffness.
ADVANTAGES OF THE PREGNOLIA System
quantitative und objective measurement of cervical stiffness
safe and simple application
takes only a few minutes
high resolution stiffness scale and less intrusive than digital palpation
how the device works
The Pregnolia System consists of a single-use sterile probe and a control unit. The probe is placed on the anterior lip of the cervix with the help of a speculum. The measurement is started by operating the foot switch, creating a weak vacuum inside the probe that pulls the tissue in. The softer the tissue, the weaker the vacuum required to deform the cervical tissue by 4mm. Within a few seconds, the device completes this procedure and displays the cervical stiffness index (CSI) as a negative pressure value (pcl in mbar).
A prototype of the device was tested in 2010–2012 in a feasibility study carried out on 50 non-pregnant women and 50 pregnant women. The aim was to record the changes in cervical stiffness throughout a normal pregnancy. The study showed that as pregnancy progresses, the cervix becomes softer, requiring less and less negative pressure to pull the tissue into the probe. The cervix softens even before it shortens (Figure 1). This allows the Pregnolia System to detect changes in the cervical tissue earlier than by measuring the cervical length with ultrasound .
Clinical data (n=1115) have shown  that pregnant women with a soft cervix are much more likely to have spontaneous preterm births than women with physiological cervical maturation (Figure 2).
In the multi-center clinical study "SoftCervix" , research is currently being conducted into how the length and stiffness of the cervix correlate with the time of birth. The results of the study are expected to be available in 2021.
 Badir, S. et al. (2013). Cervical softening occurs early in pregnancy: characterization of cervical stiffness in 100 healthy women using the aspiration technique. Prenat Diagn, 33(8), 737–741
 Parra-Saavedra, M. et al. (2011). Prediction of preterm birth using the cervical consistency index. Ultrasound Obstet Gynecol, 38(1), 44–51