What it is
Shoulder dystocia happens in roughly 0.5–1.5% of vaginal births. It is diagnosed when routine gentle traction doesn't deliver the shoulders after the head is out. Because the cord can be compressed once the head is delivered, the team moves quickly through a well-rehearsed sequence of maneuvers — this is why you may see the room fill with people and hear direct, urgent instructions. Most babies are born within a few minutes of the maneuvers starting and are fine.
Evidence review links
Each link opens the full review on the publisher's site in a new tab.
Possible benefits
- Team drills and standard maneuvers (McRoberts, suprapubic pressure, Gaskin/all-fours, internal rotations) resolve most cases quickly[ACOG↗][Royal College of Obstetricians and Gynaecologists↗]
- Recognizing shoulder dystocia is a clinical skill; hospitals and birth centers train specifically for it[ACOG↗]
- Understanding what's happening ahead of time reduces fear if it does occur[Evidence Based Birth↗]
Possible risks
- Temporary brachial plexus injury in the baby (most resolve within a year); permanent injury is uncommon[ACOG↗]
- Clavicle or humerus fracture; low newborn oxygen if not resolved quickly[ACOG↗]
- For the birthing person: postpartum hemorrhage and more extensive perineal tears[ACOG↗]
- Risk factors (diabetes, larger baby, prior shoulder dystocia) raise probability but most cases occur without them — so prediction is poor[ACOG↗][Evidence Based Birth↗]
Alternatives
- Planned cesarean is considered mainly when the estimated fetal weight is very high (e.g. ≥5000 g without diabetes, ≥4500 g with diabetes) — otherwise not recommended just for suspected big baby[ACOG↗]
- Upright positions for pushing may lower risk; the Gaskin (hands-and-knees) maneuver is a first-line option[Evidence Based Birth↗]
- For anyone with prior shoulder dystocia: discuss birth plan (location, staffing, position, threshold for maneuvers) in advance[ACOG↗]
Current evidence
ACOG Practice Bulletin 178 and RCOG's shoulder dystocia guideline both describe it as an obstetric emergency with a defined algorithm rather than a rare catastrophe. Simulation-based training is associated with better outcomes. Evidence Based Birth's article covers what causes it, what maneuvers look like, and why prediction is limited.
Where the evidence is clear · where people may choose differently
For most topics, guidelines from ACOG, WHO, and other major bodies broadly agree on the core safety points (when to act in an emergency, informed-consent standards, monitoring baselines). Where reasonable people — and even guidelines — differ tends to be around thresholds (when to start or stop something), preferences (comfort, environment, support), and values (how you weigh small risks against benefits). Use the questions below to explore those pieces with your care team.
Educational only. Your care team can help you weigh what applies to your specific situation.
Related evidence topics
Questions to ask your care team
- ?Have your team drilled shoulder dystocia recently, and how many providers can help at birth if needed?
- ?If it happens, will you talk me through what you're doing?
- ?What positions do you support for pushing — including hands-and-knees?
- ?If I've had shoulder dystocia before, how does that change our plan?
- ?What follow-up would you recommend for the baby after birth if it occurs?
Universal questions (works for any decision)
A short BRAIN-style set you can bring to any conversation about interventions, monitoring, or care decisions.
- ?Why are you recommending this now — is it urgent, routine, or optional?
- ?What happens if we wait an hour (or longer) before deciding?
- ?What signs would tell us this is working — or that we need to change course?
- ?What are the alternatives, including doing nothing?
- ?What would you recommend if this were your family?
- ?What would change your recommendation?
Sources & provenance
Tap a source to open the original guideline or review in a new tab.
- ACOG Practice Bulletin 178: Shoulder Dystocia — ACOG
- RCOG Green-top Guideline 42: Shoulder Dystocia — Royal College of Obstetricians and Gynaecologists
- Evidence on: Shoulder Dystocia — Evidence Based Birth
Plain-language paraphrase. Re-verify before publish.
Last reviewed: 2026-07-03
Further reading — canonical references
Read the source material directly. Each link opens the publisher's own current guidance in a new tab — cross-check what we summarize against what they say.
Tier 1 · Clinical guidelines
Tier 2 · Systematic reviews
Educational only. Guidelines evolve — the linked publisher pages will reflect newer guidance than any static snapshot.
Version history — v1.0.0
v1.0.0 · 2026-07-03 · LlaMamma editors
Initial shoulder dystocia topic.
New guidance from ACOG, WHO, Evidence Based Birth, or other listed sources is recorded here and can be updated remotely without a new app release.