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Induction of labour for predicted macrosomia : study protocol for the ‘Big Baby’ randomised controlled trial
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(2022) Induction of labour for predicted macrosomia : study protocol for the ‘Big Baby’ randomised controlled trial. BMJ Open, 12 (11). e058176. doi:10.1136/bmjopen-2021-058176 ISSN 2044-6055.
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Official URL: https://doi.org/10.1136/bmjopen-2021-058176
Abstract
Introduction: Large-for-gestational age (LGA) fetuses have an increased risk of shoulder dystocia. This can lead to adverse neonatal outcomes and death. Early induction of labour in women with a fetus suspected to be macrosomic may mitigate the risk of shoulder dystocia. The Big Baby Trial aims to find if induction of labour at 38+0–38+4 weeks’ gestation, in pregnancies with suspected LGA fetuses, reduces the incidence of shoulder dystocia. Methods and analysis: The Big Baby Trial is a multicentre, prospective, individually randomised controlled trial of induction of labour at 38+0 to 38+4 weeks’ gestation vs standard care as per each hospital trust (median gestation of delivery 39+4) among women whose fetuses have an estimated fetal weight >90th customised centile according to ultrasound scan at 35+0 to 38+0 weeks’ gestation. There is a parallel cohort study for women who decline randomisation because they opt for induction, expectant management or caesarean section. Up to 4000 women will be recruited and randomised to induction of labour or to standard care. The primary outcome is the incidence of shoulder dystocia; assessed by an independent expert group, blind to treatment allocation, from delivery records. Secondary outcomes include birth trauma, fractures, haemorrhage, caesarean section rate and length of inpatient stay. The main trial is ongoing, following an internal pilot study. A qualitative reporting, health economic evaluation and parallel process evaluation are included. Ethics and dissemination: The study received a favourable opinion from the South West—Cornwall and Plymouth Health Research Authority on 23/03/2018 (IRAS project ID 229163). Study results will be reported in the National Institute for Health Research journal library and published in an open access peer-reviewed journal. We will plan dissemination events for key stakeholders. Trial registration number: ISRCTN18229892.
| Item Type: | Journal Article | ||||||
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| Subjects: | R Medicine > RG Gynecology and obstetrics | ||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Clinical Trials Unit Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School |
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| SWORD Depositor: | Library Publications Router | ||||||
| Library of Congress Subject Headings (LCSH): | Labor, Induced (Obstetrics), Childbirth, Labor (Obstetrics) -- Complications -- Research, Shoulder dystocia| -- Prevention, Fetal presentation, Fetal growth disorders | ||||||
| Journal or Publication Title: | BMJ Open | ||||||
| Publisher: | BMJ Publishing Group | ||||||
| ISSN: | 2044-6055 | ||||||
| Official Date: | 11 November 2022 | ||||||
| Dates: |
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| Volume: | 12 | ||||||
| Number: | 11 | ||||||
| Article Number: | e058176 | ||||||
| DOI: | 10.1136/bmjopen-2021-058176 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Reuse Statement (publisher, data, author rights): | |||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||
| Date of first compliant deposit: | 19 April 2023 | ||||||
| Date of first compliant Open Access: | 19 April 2023 | ||||||
| RIOXX Funder/Project Grant: |
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