Normative foot length data by gestational age (GA)
| Author (year) | Country | GA reference standard | Foot length distance measured | Mean foot length for GA, cm (SD) | ||
| 28 weeks | 34 weeks | 37 weeks | ||||
| Asia | ||||||
| Kulkarni21 (1992) | India | LMP and Dubowitz score | Heel-to-hallux | 5.66 (0.68) | 6.70 (0.64) | 6.99 (0.56) |
| Kabra20 (1989) | India | LMP and Dubowitz score | Heel-to-hallux | 5.28 (0.70) | 6.83 (0.38) | 7.55 (0.54) |
| Mathur22 (1984) | India | LMP | Heel-to-hallux | 5.69 (0.35) | 6.93 (0.44) | 7.26 (0.34) |
| Singhal23 (2014) | India | LMP and Extended New Ballard Score | Heel-to-longest toe | 5.45 (0.26) | 6.80 (0.21) | 7.53 (0.28) |
| Srivastava24 (2015) | India | Extended New Ballard Score | Heel-to-longest toe | 5.50 (0) | 6.54 (0.24) | 7.45 (0.13) |
| Rakkappan19 (2016) | India | - | - | 5.26 | 6.11 | - |
| Europe | ||||||
| Merlob25 (1984) | Israel | LMP, Dubowitz score, and anterior vascular capsule of the lens examination | Heel-to-hallux | 5.25 (0.53) | 6.81 (0.70) | 7.53 (0.60) |
| Vocel26 (1978) | Czechoslovakia | LMP | Heel-to-hallux | - | 6.83 (0.31) | 7.23 (0.50) |
| Americas | ||||||
| Usher27 (1969) | Canada | LMP | Heel-to-longest toe | 5.54 (0.31) | 6.96 (0.38) | 7.80 (0.39) |
(-) symbol indicates that data is not available for that paper.
LMP, last menstrual period.