{
  "slug": "infant-swing-death",
  "question": "What are the odds an infant in a powered swing or rocker dies from strangulation or suffocation?",
  "category": "kids",
  "tags": [
    "infant",
    "household",
    "kids"
  ],
  "no_reliable_estimate": false,
  "perceived": {
    "description": "Powered infant swings sit in most US nurseries and a growing share of Polish ones, and the parental mental model is overwhelmingly that of a soothing device — the mechanical equivalent of a rocking arm. The two recent recalls (4moms Mamaroo in 2022, Fisher-Price Snuga in 2024) received broad coverage in mainstream parenting media, so awareness of \"infant swings have killed babies\" is now fairly high. What is less well understood is that the two recalls describe two distinct mechanisms — a crawling infant entangled in a dangling strap under an empty seat, versus a sleeping infant suffocating with added bedding — and that brand-level awareness does not necessarily translate into mechanism-level caution.\n",
    "rough_estimate": "~1 in 500,000 per powered-swing unit",
    "kind": "intuition"
  },
  "native": {
    "display": "6 reported infant deaths across two major US powered-swing recalls (1 Mamaroo plus 5 Snuga) covering approximately 4.32 million units",
    "numerator": 6,
    "denominator": 4320000,
    "unit": "per powered-swing unit sold in the recalled US product lines",
    "population": "US infants 0-12 months exposed to powered swings (Mamaroo and RockaRoo 2010-2022, Snuga 2010-2024)"
  },
  "normalized": {
    "lifetime_us_adult": 0.0000014,
    "display": "~1 in 720,000 chance per powered-swing unit; two distinct mechanisms (strap entanglement on Mamaroo, sleep suffocation on Snuga with added bedding)",
    "log_value": -5.85,
    "assumptions": "Six deaths total: one Mamaroo (a 10-month-old strangled by entanglement in a dangling strap while crawling under the unoccupied seat) plus five Snuga (infants aged 1-3 months, all during sleep use, four of five with added bedding, most unrestrained). Both recalls describe clear product-specific mechanisms. Per-unit denominator is well-established from CPSC-verified unit counts: 2.0 million MamaRoo plus 220,000 RockaRoo plus 2.1 million Snuga = approximately 4.32 million units. Per-unit fatality rate ~1 in 720,000. Per-infant risk is somewhat higher because units often see more than one user over their service life; an order-of-magnitude estimate is ~1 in 200,000 to 1 in 500,000 per regularly-exposed infant, with the uncertainty band reflecting the unknown average users-per-unit and the very small numerator (n=6).\n",
    "uncertainty": {
      "low": 5e-7,
      "high": 0.00001
    },
    "scope": "activity_specific_lifetime"
  },
  "sources": [
    {
      "url": "https://www.cpsc.gov/Recalls/2022/4moms-Recalls-More-than-2-Million-MamaRoo-and-RockaRoo-Infant-Swings-and-Rockers-Due-to-Entanglement-and-Strangulation-Hazards-One-Death-Reported",
      "title": "4moms Recalls More than 2 Million MamaRoo and RockaRoo Infant Swings and Rockers Due to Entanglement and Strangulation Hazards; One Death Reported",
      "publisher": "US Consumer Product Safety Commission",
      "source_type": "govt_report",
      "statistic": "2 million MamaRoo plus 220,000 RockaRoo units recalled; one 10-month-old died from asphyxiation entangled in dangling restraint strap; one other infant hospitalized",
      "excerpt": "\"4moms has received two reports of entanglement incidents involving infants who became caught in the strap under the unoccupied MamaRoo infant swing after they crawled under the seat, including a 10-month-old infant who died from asphyxiation, and a 10-month-old infant who suffered bruising to his neck before being rescued by a caregiver.\"\n",
      "source_date": "2022-08-15",
      "source_accessed": "2026-05-31",
      "calculation_notes": "Two million MamaRoo plus 220,000 RockaRoo equals approximately 2.22 million units. Mechanism is a mobile infant crawling under an unoccupied unit and becoming entangled in a dangling restraint strap. Distinct from the sleep-suffocation mechanism in the Snuga recall.\n"
    },
    {
      "url": "https://www.cpsc.gov/Recalls/2025/Fisher-Price-Recalls-More-than-2-Million-Snuga-Infant-Swings-Due-to-Suffocation-Hazard-After-5-Deaths-Reported",
      "title": "Fisher-Price Recalls More than 2 Million Snuga Infant Swings Due to Suffocation Hazard; After 5 Deaths Reported",
      "publisher": "US Consumer Product Safety Commission",
      "source_type": "govt_report",
      "statistic": "Approximately 2.1 million Snuga swings sold; 5 infant deaths (ages 1-3 months) reported 2012-2022 during sleep use, mostly with added bedding and unrestrained",
      "excerpt": "\"Between 2012 and 2022, there have been reports of five deaths involving infants 1 to 3 months of age when the product was used for sleep. In most of those incidents, the infants were unrestrained and bedding materials were added to the product. Approximately 2.1 million swings were sold in the United States.\"\n",
      "source_date": "2024-10-10",
      "source_accessed": "2026-05-31",
      "archive_url": "http://web.archive.org/web/20260524011223/https://www.cpsc.gov/Recalls/2025/Fisher-Price-Recalls-More-than-2-Million-Snuga-Infant-Swings-Due-to-Suffocation-Hazard-After-5-Deaths-Reported",
      "calculation_notes": "CPSC filed the canonical URL under /Recalls/2025/ even though the recall release date is 2024-10-10. All five deaths involved sleep use; four of five involved added bedding; most were unrestrained. Mechanism is distinct from the Mamaroo entanglement (sleep suffocation vs strap entanglement). 5 / 2.1M = 2.4e-6 per Snuga unit.\n"
    },
    {
      "url": "https://www.congress.gov/bill/117th-congress/house-bill/3182",
      "title": "H.R.3182 — Safe Sleep for Babies Act of 2021",
      "publisher": "US Congress / Congress.gov",
      "source_type": "reputable_reference",
      "statistic": "Federal ban on inclined sleep surfaces greater than 10 degrees; powered swings remain a regulatory grey area when used for sleep with added bedding",
      "excerpt": "\"Safe Sleep for Babies Act of 2021 — This bill makes it unlawful to manufacture, sell, or distribute crib bumpers or inclined sleepers for infants. Specifically, inclined sleepers for infants are those designed for an infant up to one year old and have an inclined sleep surface of greater than 10 degrees. Latest Action: 05/16/2022 Became Public Law No: 117-126.\"\n",
      "source_date": "2022-05-16",
      "source_accessed": "2026-05-31",
      "archive_url": "http://web.archive.org/web/20251203193834/https://www.congress.gov/bill/117th-congress/house-bill/3182",
      "calculation_notes": "The 2022 Act addresses inclined sleepers but powered swings designed for awake soothing fall into a regulatory grey zone. The five Snuga deaths illustrate the off-label-sleep residual risk that the Act does not directly close — the product is sold for awake use, but the deaths occurred during sleep use with added bedding.\n"
    }
  ],
  "comparison_anchors": [
    {
      "label": "Inclined sleeper death (per unit, historical)",
      "lifetime_us_adult": 0.0000042
    },
    {
      "label": "SIDS death (per infant-year)",
      "lifetime_us_adult": 0.00014
    },
    {
      "label": "Bumbo seat fall (per unit, CPSC 2007/2012)",
      "lifetime_us_adult": 0.00001
    }
  ],
  "personal_factor_multipliers": [
    {
      "factor": "Use of swing for unsupervised sleep",
      "multiplier": 30,
      "notes": "All 5 Snuga deaths occurred during sleep use; supervised awake use risk is much lower"
    },
    {
      "factor": "Added bedding placed in swing",
      "multiplier": 10,
      "notes": "4 of 5 Snuga deaths involved added bedding contrary to product instructions"
    },
    {
      "factor": "Infant unrestrained in seat",
      "multiplier": 5,
      "notes": "Most Snuga deaths involved unrestrained infants; restraint use reduces the chance of re-positioning into airway-obstructing posture"
    },
    {
      "factor": "Mobile crawling infant (8-12 months) with access to unoccupied swing",
      "multiplier": 4,
      "notes": "Mamaroo death involved a crawling infant entangled under the seat; younger infants pose no such risk because they cannot crawl"
    },
    {
      "factor": "Compliance with EN 16232+A2:2023 (EU/PL infant swing standard)",
      "multiplier": 0.7,
      "notes": "EU standard covers children up to 9 kg or pre-sit-up and tightens clamp/strap requirements, but does not address sleep-use risk explicitly"
    }
  ],
  "short_label": "Infant swing death",
  "myth_framing": "calibrated",
  "outcome_severity": "fatal",
  "exposure_pattern": "recurring",
  "outcome_type": "death",
  "valence": "negative",
  "caveats": "Six deaths across 4.32 million units is a small numerator, so the per-unit point estimate carries wide uncertainty even before accounting for the unknown average users-per-unit. The two mechanisms also do not aggregate cleanly: the Mamaroo death required a mobile infant who could crawl under an empty seat, while the Snuga deaths required a sleeping infant with added bedding. Different households face different mechanism-weighted risk depending on which products are present and how they are used. CPSC's incident database under-counts non-fatal events, so the headline figure is most reliable as a fatality rate and least reliable as a total-harm rate.\n",
  "quality_score": {
    "d1": 5,
    "d2": 5,
    "d3": 4,
    "d4": 4,
    "d5": 5,
    "d6": 4,
    "d7": 4,
    "d8": 5,
    "avg": 4.5,
    "scored_by": "claude-code-8d",
    "scored_at": "2026-05-31",
    "methodology_version": "1.2"
  },
  "reviewer": "claude-code-8d",
  "last_reviewed": "2026-05-31",
  "reviewed": true,
  "generated_at": "2026-05-31",
  "image": {
    "alt": "An empty modern powered infant swing in a residential room, viewed from a low angle, flat vector illustration in muted tones."
  },
  "attribution": "Likelier — https://likelier.app",
  "license": "https://creativecommons.org/licenses/by-sa/4.0/",
  "support": "https://buymeacoffee.com/kgluszczyk?via=likelier&utm_content=api-fear-single",
  "canonical_url": "https://likelier.app/infant-swing-death"
}