Paper 13.439

M. Balasubramanian et al., "Anthropometric Dynamics of Pregnant Women and Their Implications on Apparel Sizing", in Proc. of 4th Int. Conf. on 3D Body Scanning Technologies, Long Beach CA, USA, 2013, pp. 439-443,


Anthropometric Dynamics of Pregnant Women and Their Implications on Apparel Sizing



Department of Design, Housing and Merchandising, Oklahoma State University, Stillwater OK, USA


Anthropometric changes of pregnant women possess interesting dynamics that are mostly non-linear. These changes can be studied effectively with the use of 3-dimensional digital representations of their body at different time periods following gestation. This research discusses (a) a systematic evaluation of the non-linear changes observed in three key measurements of pregnant women - the bust, the waist, and the hip circumferences, and (b) comparison of these changes in terms of their compliance with the maternity wear sizing standard ASTM, D7197-13. Three-dimensional scanned data of 20 subjects from the study by Perkins et al. that include scans at six time periods along the span of gestation to post-delivery were imported into Polyworks for measurement. For each subject the levels for the bust, waist, and hip circumferential measurements were determined first for the scan at 4-16 weeks of gestation; measurements at all other time periods were taken at the same respective levels from the floor. Differential changes in the measurements between the periods of time windows are non-linear within a given measurement and also between the measurements. Subsequently, these changes were compared with the estimated changes recommended by the ASTM standards, i.e., an incremental increase of 9 inches at the waist, 4 inches at the hip and 3 inches at the bust during the 7th month after gestation. Wilcoxon signed-rank test (a=0.05) results showed that the actual measurement changes are significantly different from the ASTM's estimated changes in the cases of the waist (p=0.025) and the hip (p=0.0001), while the bust measurement is in agreement with the ASTM's estimate. If the observed differences between the actual and the estimated measurements are taken into consideration, a more reliable and robust sizing chart would result.


3D body scanning, pregnant women anthropometrics, digital apparel sizing


Full paper: 13.439.pdf
Proceedings: 3DBST 2013, 19-20 Nov. 2013, Long Beach California, USA
Pages: 439-443

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