Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Altitude and Reproduction of the Japanese in Bolivia

HIROSHI KASHIWAZAKI, TSUGUYOSHI SUZUKI and TAI-ICHIRO TAKEMOTO
Human Biology
Vol. 60, No. 6 (DECEMBER 1988), pp. 833-845
Stable URL: http://www.jstor.org/stable/41464078
Page Count: 13
  • Read Online (Free)
  • Download ($14.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Altitude and Reproduction of the Japanese in Bolivia
Preview not available

Abstract

Reproduction among Japanese women living at high altitudes in Bolivia was examined in comparison with their counterparts in the Bolivian lowlands. While there were no differences in age, contraceptive usage and the incidence of fetal deaths between the groups, both pregnancies and livebirths were significantly fewer in the women at high altitudes than in their lowland counterparts. However, multiple regression analyses controlling for age, age at first pregnancy (age at marriage) and age at menarche indicate that the effect of altitude on reducing fertility has not been as great as would be expected from the literature. Altitude explained less than 3% of the variance in the numbers of pregnancies and of livebirths; the difference in reproductive performance was largely attributable to later marriage in the high-altitude women than in their low-altitude counterparts. The mean birth weights of infants conceived and born at high altitudes (2673 g) were significantly smaller than those born at low altitudes (3095 g). While the mean birth weights of Japanese newborns appear to be lower at either altitude than those of Bolivian or European infants, the difference of 422 g between the high- and low-altitude infants was within the range of difference reported in previous studies for Andean and Himalayan natives, suggesting that no ethnic differences exist in the effect of hypoxia on reducing birth weight at high altitude.

Page Thumbnails

  • Thumbnail: Page 
[833]
    [833]
  • Thumbnail: Page 
834
    834
  • Thumbnail: Page 
835
    835
  • Thumbnail: Page 
836
    836
  • Thumbnail: Page 
[837]
    [837]
  • Thumbnail: Page 
838
    838
  • Thumbnail: Page 
839
    839
  • Thumbnail: Page 
840
    840
  • Thumbnail: Page 
841
    841
  • Thumbnail: Page 
842
    842
  • Thumbnail: Page 
843
    843
  • Thumbnail: Page 
844
    844
  • Thumbnail: Page 
845
    845