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Clinical Trial Details — Status: Active, not recruiting

Administrative data

NCT number NCT04437576
Other study ID # STUDY00020328
Secondary ID
Status Active, not recruiting
Phase
First received
Last updated
Start date September 13, 2019
Est. completion date June 1, 2021

Study information

Verified date June 2020
Source Oregon Health and Science University
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

The proposed pilot investigation is a prospective, observational study of 300 healthy nulliparous women with spontaneous term labor onset. The specific aims of this study are to:

Aim #1: Characterize IL-8 (pro-inflammatory biomarker), basal body temperature, maternal heart rate, and electrical activity of the uterus prior to spontaneous onset of labor through the onset of active labor among nulliparous women. IL-8 will be quantified weekly, daily basal body temperature, as well as continuous maternal heart rate and electrical activity of the uterus throughout the transition from late pregnancy into active labor.

Aim #2: Characterize latent labor symptoms among nulliparous women in spontaneous labor. Using Likert scale, childbirth-specific, symptom-specific PROMIS measures,45 and open-ended questions will be quantified and characterize latent labor symptoms (e.g., intensity, frequency) and identify relevant themes.

Aim #3: Characterize trajectories of labor biomarkers and latent labor symptoms across latent labor duration. A modified growth mixture modeling approach to quantify subgroup phenotypes among nulliparous women in spontaneous latent labor will be employed.

Hypothesis 3.1. There will be significant congruence between higher biomarkers (e.g., higher IL-8, more uterine electrical activity) and symptoms that are more intense and frequent.

Hypothesis 3.2. At least two classes of laboring women with distinct trajectories of change in biomarkers and symptoms can be identified and will be associated with cervical dilation at hospital admission.

Exploratory Aim: Characterize biomarkers among nulliparous women with spontaneous labor onset vs. nulliparous women requiring labor induction for post-term gestation. Weekly IL-8, daily basal body temperature, as well as continuous maternal heart rate and electrical activity of the uterus throughout the transition from late pregnancy into active labor between those whose labor begins spontaneously and those whose labors are induced for post-term gestation will be quantified.

Exploratory Hypothesis. There will be different biomarker patterns between women with spontaneous labor onset vs. those without.

The Standard descriptive and inferential statistics as well as growth mixture modeling for quantitative aims will be used. The investigators will use thematic development for qualitative aims.


Recruitment information / eligibility

Status Active, not recruiting
Enrollment 300
Est. completion date June 1, 2021
Est. primary completion date June 1, 2021
Accepts healthy volunteers
Gender Female
Age group 20 Years to 39 Years
Eligibility Inclusion Criteria:

1. Nulliparous

2. Maternal age of at least 20 years of age.

3. Maternal age of no greater than 39 years of age.

4. Viable, term pregnancy: = 37 weeks gestation at time of signing study consent.

5. Able to understand and provide an informed consent.

6. Able to understand English.

Exclusion Criteria:

1. Multiple gestation (i.e., carrying >1 fetus)

2. Managing complex comorbidities (e.g., preeclampsia)

3. Documented fetal congenital anomalies

4. Preterm labor and birth

5. Persistent breech fetal position at term

6. Fetal death prior to the onset of labor

7. Any indication for planned cesarean birth (e.g., placenta previa)

8. Induction of labor for medical indication (e.g., oligohydramnios)

Study Design


Related Conditions & MeSH terms


Locations

Country Name City State
United States OHSU Portland Oregon

Sponsors (4)

Lead Sponsor Collaborator
Oregon Health and Science University Bloomlife Technologies, Medical Research Foundation, Oregon, OHSU School of Nursing

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Other Change in Basal body temperature comparison in spontaneous labor vs induction Quantified weekly basal body temperature comparison throughout the transition from late pregnancy into active labor between those whose labor begins spontaneously and those whose labors are induced for post-term gestation. week 37, week 38, week 39, week 40, week 41, week 42, upon admission for labor to OHSU
Other Changes in continuous maternal heart rate comparison in spontaneous labor vs induction Quantified maternal heart rate comparison throughout the transition from late pregnancy into active labor between those whose labor begins spontaneously and those whose labors are induced for post-term gestation. week 37, week 38, week 39, week 40, week 41, week 42, upon admission for labor to OHSU
Other Changes in IL-8 comparison in spontaneous labor vs induction Quantified weekly IL-8 comparison throughout the transition from late pregnancy into active labor between those whose labor begins spontaneously and those whose labors are induced for post-term gestation. week 37, week 38, week 39, week 40, week 41, week 42, upon admission for labor to OHSU
Primary Change in Interleukin-8 (IL-8) expression during latent phase of labor to delivery Measure of IL-8 in serum week 37, week 38, week 39, week 40, week 41, week 42, upon admission for labor to OHSU
Primary Changes in Basal body temperature during latent phase of labor to delivery Measure body temperature first thing every morning until admission to hospital for birth. Daily from 37 weeks gestation until admission to hospital for labor
Primary Change in Maternal heart rate during latent phase of labor to delivery Wearable sensor worn to record heart rate continually. Continuously from 37 weeks gestation until admission to hospital for labor
Primary Change in electrical activity of the uterus during latent phase of labor to delivery Wearable sensor that records signals detected on the surface of the abdomen (e.g. signals generated by the uterus) and movements. Continuously from 37 weeks gestation until admission to hospital for labor
Secondary Characterize latent labor symptoms among nulliparous women in spontaneous labor Quantify and characterize latent labor symptoms and identify relevant themes week 37, week 38, week 39, week 40, week 41, week 42, upon admission for labor to OHSU
Secondary Characterize trajectories of latent labor biomarkers across latent labor duration Quantify subgroup phenotypes among nulliparous women in spontaneous latent labor week 37, week 38, week 39, week 40, week 41, week 42, upon admission for labor to OHSU
Secondary Characterize trajectories of latent labor symptoms across latent labor duration Quantify subgroup phenotypes among nulliparous women in spontaneous latent labor using growth mixture modeling viewing longitudinal change. week 37, week 38, week 39, week 40, week 41, week 42, upon admission for labor to OHSU
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