Early prenatal attainment of adult metacarpal-phalangeal rankings and proportions

Am J Phys Anthropol. 1975 Nov;43(3):327-32. doi: 10.1002/ajpa.1330430305.


As shown in 56 human embryos and fetuses between 15 and 104 mm in crown-rump length, "adult" metacarpal-phalangeal length rankings are attained by the seventh intrauterine week and near-adult bone-to-bone ratios or proportions by the theirteenth week. Micrometric measurements of optically-projected histological hand sections show relative elongation of the distals between the 15-29 mm and 30-44 mm crown-rump range, and relative reduction to radiogrammetrically-determined adult proportions by the 90-104 mm CRL.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Anthropology, Physical
  • Fingers / embryology*
  • Humans
  • Metacarpus / embryology*
  • Osteogenesis*