[Measurement of bone density by ultrasound bone densitometer in normal pregnant women].

The bone mineral density in reproductive aged and pregnant women was measured with an ultrasound bone densitometer (Achilles, Luner Co, USA). Both parameters of bone density on Os calsis, sound of speed (SOS) and broad ultrasound attenuation (BUA) were significantly correlated with bone mineral density in lumbar2-4 measured by dual energy X-ray absorptiometry (DXA) (p < 0.01) in reproductive aged women (mean age; 24.5 +/- 2.3, n = 30). The changes in bone density during pregnancy and at delivery were studied. In a cross-sectional study, no significant changes in SOS, BUA and stiffness were observed, but in a longitudinal study (n = 21), all of these parameters decreased as pregnancy advanced. The markers of bone turnover (serum Ca, alkaline phosphatase, procollagen type 1-C peptide, urinary Ca/Cr and deoxypyridinoline/Cr) did not change during pregnancy. Ten pregnant women with low bone density (less than-1.5 SD mean value) were found. There was no significant difference between the markers of bone turnover in pregnant women with low and normal bone density. The clinical usefulness of the screening of bone density of reproductive aged and pregnant women to detect osteopenia is suggested.