{
  "url": "https://dantelabs.com/traits/delayed-ability-to-crawl",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "delayed-ability-to-crawl",
    "id": "HP:0033128",
    "name": "Delayed ability to crawl",
    "definition": "A failure to achieve the ability to crawl at an appropriate developmental stage. Normal infant motor development is marked by a series of postural milestones including learning to crawl on hands and knees between the ages of 6 and 10 months.",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormality-of-the-nervous-system",
        "name": "Abnormality of the nervous system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-nervous-system"
      }
    ],
    "broader": [
      {
        "slug": "delayed-gross-motor-development",
        "name": "Delayed motor skills",
        "url": "https://dantelabs.com/traits/delayed-gross-motor-development"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "dnm1l",
        "symbol": "DNM1L",
        "hgnc": "HGNC:2973",
        "name": "dynamin 1L",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dnm1l"
      },
      {
        "slug": "dot1l",
        "symbol": "DOT1L",
        "hgnc": "HGNC:24948",
        "name": "DOT1 like histone lysine methyltransferase",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dot1l"
      },
      {
        "slug": "itpr1",
        "symbol": "ITPR1",
        "hgnc": "HGNC:6180",
        "name": "inositol 1,4,5-trisphosphate receptor type 1",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/itpr1"
      },
      {
        "slug": "man2b2",
        "symbol": "MAN2B2",
        "hgnc": "HGNC:29623",
        "name": "mannosidase alpha class 2B member 2",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/man2b2"
      },
      {
        "slug": "mdh2",
        "symbol": "MDH2",
        "hgnc": "HGNC:6971",
        "name": "malate dehydrogenase 2",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/mdh2"
      },
      {
        "slug": "med16",
        "symbol": "MED16",
        "hgnc": "HGNC:17556",
        "name": "mediator complex subunit 16",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/med16"
      },
      {
        "slug": "mrps25",
        "symbol": "MRPS25",
        "hgnc": "HGNC:14511",
        "name": "mitochondrial ribosomal protein S25",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/mrps25"
      },
      {
        "slug": "nav3",
        "symbol": "NAV3",
        "hgnc": "HGNC:15998",
        "name": "neuron navigator 3",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nav3"
      },
      {
        "slug": "rbl2",
        "symbol": "RBL2",
        "hgnc": "HGNC:9894",
        "name": "RB transcriptional corepressor like 2",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rbl2"
      },
      {
        "slug": "son",
        "symbol": "SON",
        "hgnc": "HGNC:11183",
        "name": "SON DNA and RNA binding protein",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/son"
      },
      {
        "slug": "zrsr2",
        "symbol": "ZRSR2",
        "hgnc": "HGNC:23019",
        "name": "zinc finger CCCH-type, RNA binding motif and serine/arginine rich 2",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/zrsr2"
      },
      {
        "slug": "celf2",
        "symbol": "CELF2",
        "hgnc": "HGNC:2550",
        "name": "CUGBP Elav-like family member 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/celf2"
      },
      {
        "slug": "hivep2",
        "symbol": "HIVEP2",
        "hgnc": "HGNC:4921",
        "name": "HIVEP zinc finger 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/hivep2"
      },
      {
        "slug": "pgap1",
        "symbol": "PGAP1",
        "hgnc": "HGNC:25712",
        "name": "post-GPI attachment to proteins inositol deacylase 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/pgap1"
      },
      {
        "slug": "ctnnb1",
        "symbol": "CTNNB1",
        "hgnc": "HGNC:2514",
        "name": "catenin beta 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ctnnb1"
      }
    ]
  }
}