Spinal morphine to reduce pain after planned caesarean section
Official title: MOTHER Trial: Efficacy and Safety of Low-dose Intrathecal Morphine Following Planned Caesarean Section - a Randomised, Blinded, Clinical, Controlled, Multicentre Trial.
Run by Zealand University Hospital · NCT06797973 · Data updated 2026-11-12
This trial will test whether adding a small dose of morphine to spinal anesthesia helps women having planned caesarean sections have less pain afterward without harming mother or baby.
Quick facts
| Phase | Phase 4 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | Women only |
| Enrollment | 1312 (estimated) |
| Sponsor | Zealand University Hospital Academic / other |
| Locations | 9 sites (Aarhus and 8 other locations) |
| Status | Recruiting |
| Started | July 15, 2025 |
| Main results expected | May 31, 2027 |
| Study ends | June 30, 2027 |
| Registry record updated | September 11, 2026 |
| Trial ID | NCT06797973 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adult women (≥18 years) with a singleton pregnancy scheduled for a planned caesarean under spinal anesthesia who can read Danish and give informed consent.
✕Probably not a fit
Patients planned for combined spinal‑epidural or a postoperative epidural, those with allergy or contraindication to morphine, and those unable to read Danish (including many emergency cesarean cases) are unlikely to be eligible or to benefit from this intervention.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a pragmatic, randomized, double-blind, placebo-controlled multicenter trial comparing low-dose (80 µg) intrathecal morphine versus saline added to standard spinal anesthesia for planned caesarean section. All participants receive standard multimodal postoperative analgesia and may use oral morphine as needed, while researchers collect pain scores, side-effect questionnaires, and maternal and neonatal safety data from medical records and surveys. Co-primary outcomes are postoperative pain (numeric rating scale) and a composite maternal-neonatal safety outcome, with a planned enrollment of 1,312 participants to detect clinically relevant differences. The trial is investigator-initiated and designed to provide pragmatic evidence about the balance of benefits and harms of adding intrathecal morphine.
Why it matters
Potential benefit: If successful, adding low-dose intrathecal morphine could reduce early postoperative pain and opioid use after caesarean, speeding recovery and supporting mother–infant bonding.
How similar studies have gone: Previous smaller trials and routine clinical use suggest intrathecal morphine gives up to 24 hours of improved analgesia after caesarean, but high-quality large randomized evidence on low-dose protocols and safety trade-offs is still limited.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Patients ≥ 18 years * Singleton pregnancy * Scheduled for planned caesarean section performed under spinal anaesthesia * Written informed consent Exclusion Criteria: * Allergy to or contraindications towards trial medication * Patients planned for postoperative epidural due to expected difficult postoperative pain management * Patients planned for combined spinal-epidural as primary anaesthesia * Inability to understand and read Danish * Previous inclusion in the trial
Where it's running
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Aarhus University Hospital
Aarhus, Denmark Recruiting -
Copenhagen University Hospital - Rigshospitalet
Copenhagen, Denmark Recruiting -
Copenhagen University Hospital - Herlev and Gentofte, Herlev
Herlev, Denmark Recruiting -
Copenhagen University Hospital - North Zealand, Hillerød
Hillerød, Denmark Recruiting -
Regional Hospital Horsens
Horsens, Denmark Recruiting -
Copenhagen University Hospital - Amager and Hvidovre, Hvidovre
Hvidovre, Denmark Recruiting
Show 3 more locations
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University Hospital of Southern Denmark - Lillebælt Hospital, Kolding
Kolding, Denmark Recruiting -
University Hospital of Southern Denmark - Odense University Hospital
Odense C, Denmark Recruiting -
Zealand University Hospital
Roskilde, Denmark Recruiting
Study contacts
- Study coordinator: Anneline B Seegert, MD
- Email: ansee@regionsjaelland.dk
- Phone: +4547326397
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.