ClinicalTrials.gg
Status unknownNCT03428685Updated Apr 10, 2019

Progesterone to Prevent Preterm Delivery

A Phase 2/3 interventional study of Dydrogesterone Oral Tablet and Placebo Oral Tablet in Preterm Birth, sponsored by The University of Hong Kong. Status unknown at 1 site in China. Open to female participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-04-10.

Sponsored by The University of Hong Kong · Phase 2/3, Interventional, and Prevention

The sponsor has not verified this record recently (last verified Apr 2019), so the status shown — last known as Recruiting — may be out of date.
Phase
Phase 2/3
Study type
Interventional
Enrollment
1,714
Allocation
Randomized
Ages
18 Years and older
Sex
Female
01

Study summary

Preterm birth (PTB) is a major challenge to perinatal health. It is defined as delivery before 37 completed gestational weeks. It accounts for 75% of perinatal deaths and more than 50% of long-term neurological disabilities, and it is the second most common cause of death in children under the age of 5 year. Neonates born preterm are at risk of respiratory distress syndrome, chronic lung disease, retinopathy of prematurity, necrotizing enterocolitis, intraventricular haemorrhage and sepsis in the short term, as well as cerebral palsy, motor and sensory impairment, learning difficulties, and increased risk of chronic disease in long run. It is estimated that the societal cost of PTB is $26 billion annually in the USA alone.

Until now, prevention or reduction of PTB is based on identification of risk factors in obstetrical history, biochemical markers and short cervix. History of PTB and asymptomatic short cervix at the second trimester are both strong predictors for PTB. In women with asymptomatic short cervix at the second trimester, vaginal progesterone could effectively reduce PTB. Universal cervical length screening followed by treatment with vaginal progesterone has been shown to be the most cost effective strategy in preventing PTB. These findings were confirmed in meta-analysis.

Nevertheless, only minority of women may benefit from progesterone treatment if it was being started at the second trimester. There is still a large proportion of PTB, which is currently not preventable, and the current approach to prevent PTB is far from ideal.

One possible hypothesis is that the initiation of progesterone treatment would be too late for its effect to take place. Therefore, we decide to use oral progesterone in the current study. The objective of the study is to determine whether early use of progesterone can prevent PTB better when compared with universal screening of cervical length and followed by treatment with progesterone in those with short cervix.

02

Conditions studied

  • Preterm Birth

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03

In context

Premature Birth

2,550 studies on the registry are indexed under Premature Birth; 500 are open to participants now.

This study's planned enrollment of 1,714 is above the median of 84 across 1,666 interventional studies indexed under Premature Birth.

Browse Premature Birth studies →

Lead sponsor

The University of Hong Kong is the lead sponsor of 1,292 studies on the registry; 348 are open to participants now.

Of its 9 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • All women age ≥ 18 years old
  • Confirmed intrauterine singleton pregnancy
  • Gestational age less than 14 completed weeks as defined by pelvic ultrasound

Exclusion criteria

Exclusion Criteria:

  • Silent miscarriage: mean gestational sac diameter ≥25 mm without fetal pole, or embryo with crown rump length ≥7 mm and no heartbeat, or no interval growth
  • Suspected ectopic pregnancy
  • Multiple pregnancy with silent miscarriage of one twin
  • Heavy vaginal bleeding requiring surgical intervention
  • Severe abdominal pain requiring surgical intervention
  • Presence of fever
  • History of adverse reaction to progesterone
  • History of breast or genital tract
  • History of suspected thromboembolic disease
  • Congenital uterine anomaly
  • Unwillingness or inability to comply with study procedures
  • Known paternal or maternal abnormal karyotype
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

05

Study design

Phase
Phase 2 / Phase 3
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
1,714 participants (estimated)

Study arms

  • Active comparator
    Intervention group

    Drug: Dydrogesterone Oral Tablet

  • Placebo comparator
    Placebo group

    Drug: Placebo Oral Tablet

Interventions

  • Oral dysdrogesteone 10mg tds will be prescribed from 12 - 36+6 weeks.

  • DrugPlacebo Oral Tablet

    Placebos will be prescribed from 12 - 36+6 weeks.

06

What researchers measure

Primary outcomes

  1. Rate of preterm delivery

    Time frame: before 37+0 gestational weeks

07

Study locations

1 of 1 sites recruiting
  • Department of Obstetrics and Gynaecology
    Hong Kong, Hong Kong 852, China
    Recruiting
08

References and documents

Publications

  • Cheung KW, Seto MTY, Ng EHY. Early universal use of oral progesterone for prevention of preterm births in singleton pregnancy (SINPRO study): protocol of a multicenter, randomized, double-blind, placebo-controlled trial. Trials. 2020 Jan 30;21(1):121. doi: 10.1186/s13063-020-4067-z. PubMed 32000820 ↗
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Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Jan 2019 (actual). Primary completion is estimated for Jan 2021, 24 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 4, 2018
First posted
Feb 12, 2018
StartActual
Jan 15, 2019
Primary completionEst.
Jan 2021
CompletionEst.
Jan 2023
Last update
Apr 10, 2019
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Apr 10, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03428685
Responsible party
Dr. Cheung Ka Wang (Associate Consultant, The University of Hong Kong) — Principal investigator
First posted
Feb 12, 2018
Start date
Jan 15, 2019
Primary completion
Jan 2021 (estimated)
Completion
Jan 2023 (estimated)
Last update
Apr 10, 2019

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Apr 2019. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Dydrogesterone

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