Table 1.
Summary statistics of calculated gestation length for 2,734 Holsteins giving birth to a liveborn singleton
| Sex of offspring | Parity | n | Gestation length (days) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | P0.5 | P1 | P25 | P50 | P75 | P95 | P97.5 | P99 | P99.5 | Max | |||
| Overall | 2,734 | 239 | 259 | 261 | 275 | 278 | 281 | 286 | 288 | 290 | 292 | 317 | |
| Female | 1 | 540 | 247 | 259 | 264 | 273 | 277 | 279 | 284 | 285 | 287 | 287 | 317 |
| Female | 2 | 412 | 239 | 252 | 256 | 274 | 277 | 280 | 285 | 287 | 289 | 294 | 296 |
| Female | 3 | 250 | 240 | 262 | 267 | 276 | 278 | 282 | 287 | 288 | 289 | 290 | 292 |
| Female | ≥ 4 | 150 | 256 | 263 | 266 | 275 | 278 | 282 | 286 | 292 | 292 | 293 | 296 |
| Male | 1 | 542 | 251 | 260 | 266 | 275 | 278 | 281 | 285 | 286 | 288 | 289 | 291 |
| Male | 2 | 414 | 253 | 260 | 261 | 276 | 280 | 283 | 288 | 289 | 291 | 294 | 306 |
| Male | 3 | 256 | 259 | 260 | 262 | 277 | 280 | 282 | 288 | 289 | 291 | 292 | 294 |
| Male | ≥ 4 | 170 | 261 | 269 | 272 | 277 | 280 | 283 | 288 | 289 | 291 | 292 | 292 |
Data showing the association between calculated gestation length and the parity of the dam and sex of the offspring are included. P = percentile