This graph shows only babies born as a result of spontaneous (non-induced) labor (75% of all participants)
Do babies come on their due dates? Not really. But they seem to come around their due dates. In the survey, only 80 out of 1884 (4.2%) spontaneously arrived on the exact day. But if you look around that date, the numbers get bigger fast... 480 babies (25.5%) arrived spontaneously between 39 weeks 4 days and 40 weeks 3 days. 881 (46.8%) arrived spontaneously within a week of their due date. Throwing out inductions makes those percentages even higher: 62.1% of all non-induced babies arrived within a week of their due date.
| Day | In weeks | Babies Spontaneously Born |
|---|---|---|
| 245 | 35W,0D | 2 |
| 246 | 35W,1D | 2 |
| 247 | 35W,2D | 1 |
| 248 | 35W,3D | 5 |
| 249 | 35W,4D | 2 |
| 250 | 35W,5D | 5 |
| 251 | 35W,6D | 3 |
| 252 | 36W,0D | 5 |
| 253 | 36W,1D | 7 |
| 254 | 36W,2D | 9 |
| 255 | 36W,3D | 7 |
| 256 | 36W,4D | 3 |
| 257 | 36W,5D | 6 |
| 258 | 36W,6D | 9 |
| 259 | 37W,0D | 7 |
| 260 | 37W,1D | 11 |
| 261 | 37W,2D | 10 |
| 262 | 37W,3D | 13 |
| 263 | 37W,4D | 16 |
| 264 | 37W,5D | 16 |
| 265 | 37W,6D | 23 |
| 266 | 38W,0D | 15 |
| 267 | 38W,1D | 17 |
| 268 | 38W,2D | 10 |
| 269 | 38W,3D | 33 |
| 270 | 38W,4D | 36 |
| 271 | 38W,5D | 34 |
| 272 | 38W,6D | 38 |
| 273 | 39W,0D | 42 |
| 274 | 39W,1D | 38 |
| 275 | 39W,2D | 43 |
| 276 | 39W,3D | 53 |
| 277 | 39W,4D | 57 |
| 278 | 39W,5D | 64 |
| 279 | 39W,6D | 80 |
| 280 | 40W,0D | 80 |
| 281 | 40W,1D | 80 |
| 282 | 40W,2D | 55 |
| 283 | 40W,3D | 64 |
| 284 | 40W,4D | 60 |
| 285 | 40W,5D | 49 |
| 286 | 40W,6D | 52 |
| 287 | 41W,0D | 64 |
| 288 | 41W,1D | 38 |
| 289 | 41W,2D | 30 |
| 290 | 41W,3D | 28 |
| 291 | 41W,4D | 29 |
| 292 | 41W,5D | 19 |
| 293 | 41W,6D | 15 |
| 294 | 42W,0D | 14 |
| 295 | 42W,1D | 8 |
| 296 | 42W,2D | 5 |
| 297 | 42W,3D | 2 |
| 298 | 42W,4D | 1 |
| 299 | 42W,5D | 2 |
| 300 | 42W,6D | 0 |
| 301 | 43W,0D | 2 |