In 1,000 consecutive patients the incidence of gestational diabetes was 1·0%. In the group of 182 patients with abnormal glucose tolerance the Incidences of large-for-dates infants and major fetal malformations were not increased in comparison with the total series. Of the accepted indications for performing a glucose tolerance test in pregnancy only maternal age over 30 years was found to have a significantly increased incidence of an abnormal result.
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Macafee et al. (1974) studied this question.
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