Preterm Birth Clinical Trial
Official title:
Investigation Into the Fungal Microbiome (Mycobiome) in the Cervices of Cervical Insufficiency Patients Receiving Cerclage Treatment and Resulting in Term or Preterm Birth
Pregnant women with short cervical length (<25 mm) in second-trimester ultrasonographic assessment are at high risk for preterm birth, a major cause of perinatal mortality and morbidity worldwide. Some of these short-cervix women proceed to a more advanced stage manifested as a painless prematurely dilated cervix in the second trimester. It is not fully understood why some women have short cervical length or prematurely dilated cervix (cervical insufficiency), although evidence is mounting that there is an association between short cervical length and infection by microorganisms. The investigators hypothesize that the cervical microorganisms in pregnant women with a shortened or dilated cervix are different, compared with those in women with normal cervical length and a closed cervix.
Previously, culture-dependent methods were used to detect bacterial or fungal infection, but the sensitivity was low, since not all species grew well in culture. Recently, molecular methods based on PCR amplification of the bacterial 16S ribosomal RNA (rRNA) gene or the fungal internal transcribed spacer (ITS) followed by capillary sequencing has been used to identify bacteria and fungi. However, the resolution of such capillary sequencing-based method (<100 sequencing reads/sample) is too low to capture the major collection of microorganisms in a sample. Less abundant but possibly pathogenic microorganisms associated with short cervical length remain undetectable. To address the current gap in this field, we propose to more comprehensively survey microbial communities in the cervix of pregnant women by PCR amplification of the 16S rRNA region, ITS or other genomic regions with taxonomic classification potential. This will be followed by next-generation sequencing (>40,000 sequencing reads/sample), which has been proven to capture the majority of microorganisms in a sample. ;
Status | Clinical Trial | Phase | |
---|---|---|---|
Not yet recruiting |
NCT05934318 -
L-ArGinine to pRevent advErse prEgnancy Outcomes (AGREE)
|
N/A | |
Completed |
NCT05502510 -
Assessing the Effectiveness and Efficacy of the MyHealthyPregnancy Application
|
||
Not yet recruiting |
NCT03418311 -
Cervical Pessary Treatment for Prevention of s PTB in Twin Pregnancies on Children`s Long-Term Outcome
|
N/A | |
Not yet recruiting |
NCT03418012 -
Prevention of sPTB With Early Cervical Pessary Treatment in Women at High Risk for PTB
|
N/A | |
Completed |
NCT02993744 -
Maternal Inflammatory Parameters Within Routine Treatment With Betamethasone
|
N/A | |
Active, not recruiting |
NCT02673216 -
Infection and Adverse Pregnancy Outcome
|
||
Completed |
NCT01683565 -
Preemie Tots: A Pilot Study to Understand the Effects of Prematurity in Toddlerhood
|
Phase 4 | |
Completed |
NCT01412931 -
Protein and Ultrasound Indicators of Preterm Birth
|
N/A | |
Completed |
NCT01460576 -
Improving Prematurity-Related Respiratory Outcomes at Vanderbilt
|
N/A | |
Completed |
NCT02606058 -
The Australian Placental Transfusion Study (APTS): Should Very Pre Term Babies Receive a Placental Blood Transfusion at Birth Via Deferring Cord Clamping Versus Standard Cord Clamping Procedures?
|
N/A | |
Terminated |
NCT03715530 -
Use of Placental Alpha Microglobulin-1(PAMG-1) to Diagnose Premature Rupture of Membranes in Pregnant Women
|
N/A | |
Completed |
NCT00422526 -
Progesterone for Prevention of Preterm Birth in Women With Short Cervix: Randomized Controlled Trial
|
Phase 3 | |
Enrolling by invitation |
NCT04251260 -
Effectiveness of Positioning in Preterm Neonates
|
N/A | |
Completed |
NCT03668860 -
India Dexamethasone and Betamethasone
|
Phase 1 | |
Recruiting |
NCT03638037 -
Correlation Between Maternal Vitamin D Level And Preterm Birth
|
||
Completed |
NCT02225353 -
Efficacy Study of a Cervical Pessary Containing Progesterone for the Prevention of Preterm Delivery
|
Phase 2 | |
Recruiting |
NCT03992534 -
The FLIP-1 Study: Vaginal Lactobacillus Supplementation in Women at High Risk of Preterm Birth
|
Phase 1 | |
Completed |
NCT03144141 -
Association Between EHG and Risk of Preterm Delivery in Women Hospitalized for Threatened Premature Delivery
|
N/A | |
Completed |
NCT05210985 -
Examination of the Relationship Between Home Affordances With Development
|
||
Completed |
NCT04021654 -
What is the Future of Vulnerable New-borns
|