Pregnancy and Latent Labor Biomarkers and Symptoms to Predict Cervical Dilation at Hospital Admission

Latent Preg.

We want to learn what labor biomarkers and symptoms are related to the onset and propagation of spontaneous labor and to identify how trajectories of this variable affect the primary outcome such as stage of labor based on cervical dilation at hospital admission. With this information, we hope it can reduce early hospital admission for women until they reach active labor, characterize biomarker patterns between women whose labors begin spontaneously versus those who reach post-term gestation without labor onset, as well as potentially reduce cesarean delivery overuse. As part of the study, you will use a Bloomlife uterine monitor (to track uterine activity), a thermometer, a smartphone application, and have your blood drawn for the initial visit, weekly prenatal visit(s), and once you are admitted to the hospital for birth.


  • Greater than 35 weeks of pregnancy (≥ 37 wks. At the time of the 1st study visit)
  •  Having your first baby
  • Planning a vaginal birth
  •  Between 20 and 39 years old
  •  Delivering at OHSU


At the end of the first study visit, we will provide you a debit card with a $25 value. Then after
completing the study we will add another $150 onto the debit card for you to use.

Whom do I contact for additional information?

To find out more information and to learn if you are qualified to participate, call the Maternal Fetal Medicine Unit at 503-494-8748 or email us at