NCT04456660

Brief Summary

This study aims to determine the role of serum biomarkers and placental bloodflow in the comprehensive evaluation of the risk for spontaneous abortion

Trial Health

43
At Risk

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Trial has exceeded expected completion date
Enrollment
200

participants targeted

Target at P75+ for all trials

Timeline
Completed

Started Jun 2020

Typical duration for all trials

Geographic Reach
1 country

1 active site

Status
unknown

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

Study Start

First participant enrolled

June 20, 2020

Completed
5 days until next milestone

First Submitted

Initial submission to the registry

June 25, 2020

Completed
7 days until next milestone

First Posted

Study publicly available on registry

July 2, 2020

Completed
3.4 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

November 20, 2023

Completed
11 days until next milestone

Study Completion

Last participant's last visit for all outcomes

December 1, 2023

Completed
Last Updated

October 26, 2023

Status Verified

October 1, 2023

Enrollment Period

3.4 years

First QC Date

June 25, 2020

Last Update Submit

October 23, 2023

Conditions

Outcome Measures

Primary Outcomes (1)

  • Occurence of a spontaneous abortion

    Absent heart rate pulsations on an ultrasound scan

    Up to 24 weeks of gestation

Study Arms (2)

Control group

Monitoring of pregnancy, including data on: * maternal age and other demographic characteristics; * ultrasound measurement of fetal heart rate (FHR) and crown-rump length (CRL)

sFlt-1, Doppler and NK cells types group

Monitoring of pregnancy, including data on: * maternal age and other demographic characteristics; * ultrasound measurement of fetal heart rate (FHR) and crown-rump length (CRL), uterine arteries PI, and other parameters; * measurement of serum sFlt-1, PLGF, and glycodelin-A levels, as well as other parameters; * measurement of CD16+, CD56+, and other subpopulations of NK cells;

Diagnostic Test: Markers of ultrasoundDiagnostic Test: Immunologic factorsDiagnostic Test: Serum factors

Interventions

Markers of ultrasoundDIAGNOSTIC_TEST

CRL, HR, and other ultrasound measurements.

sFlt-1, Doppler and NK cells types group
Immunologic factorsDIAGNOSTIC_TEST

Measurement of NK cells subpopulations types in the maternal serum

sFlt-1, Doppler and NK cells types group
Serum factorsDIAGNOSTIC_TEST

Measuring the maternal serum concentration of sFlt-1, PLGF, glycodelin-A, and other substances.

sFlt-1, Doppler and NK cells types group

Eligibility Criteria

Age18 Years - 50 Years
Sexfemale(Gender-based eligibility)
Healthy VolunteersYes
Age GroupsAdult (18-64)
Sampling MethodProbability Sample
Study Population

Pregnant women between 18 and 50 years of age.

You may qualify if:

  • visualized fetal structures in utero \& heart pulsations until 8th week of gestation
  • normal THS/T4 levels
  • no uterine malformations
  • BMI \< 27
  • signed informed consent

You may not qualify if:

  • fetal structures in utero \& heart pulsations not visualized until the 8th week of gestation
  • elevated THS/T4 levels
  • uterine malformations
  • BMI \> 27

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Orthogyn Medical and Dental Center

Sofia, 1618, Bulgaria

RECRUITING

MeSH Terms

Conditions

Abortion, Spontaneous

Condition Hierarchy (Ancestors)

Pregnancy ComplicationsFemale Urogenital Diseases and Pregnancy ComplicationsUrogenital Diseases

Study Officials

  • Petar N Ignatov, PhD

    Orthogyn Medical Center

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Petar N Ignatov, PhD

CONTACT

Study Design

Study Type
observational
Observational Model
COHORT
Time Perspective
PROSPECTIVE
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Assist. Prof. Petar Ignatov, MD, Ph.D.

Study Record Dates

First Submitted

June 25, 2020

First Posted

July 2, 2020

Study Start

June 20, 2020

Primary Completion

November 20, 2023

Study Completion

December 1, 2023

Last Updated

October 26, 2023

Record last verified: 2023-10

Data Sharing

IPD Sharing
Will not share

Locations