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Longitudinal changes in bone mineral density during normal pregnancy.

Abstract：

:Pregnancy is a common physiological event that could affect peak bone mass and the risk of developing osteoporosis later in life. There have been few longitudinal studies over a complete reproductive cycle of any size to show whether bone mineral density (BMD) changes. We have measured BMD by dual-energy X-ray absorptiometry in 46 normal women before conception and then again immediately after delivery and compared them with 30 control women who failed to conceive. Fifteen women were osteopenic in preconceptual BMD, but there was no difference between those who did or did not become pregnant. During pregnancy there was a small and statistically nonsignificant decline in BMD at all sites. The decrease at the trochanteric region was 4.2%, while losses at other sites were about 1%. The decline at the trochanter exceeded the least significant change between two measurements (5.04%) in 17 women (40.5%) with significant changes within individuals being much less common at the other measurement sites. The nonpregnant controls showed small increases in BMD of 0.3%-1.9% but no woman lost more than the least significant change. At the trochanter there was a significant difference (P = 0.013) between those who did and did not become pregnant. There was a good correlation between changes in BMD at all sites and no significant difference in the slope of these correlations between the pregnant and control groups. Correlations with lumbar spine were total hip, r = 0.46, P = 0.0001; femoral neck, r = 0.49, P = 0.0005; and trochanter, r = 0.66, P < 0.0001.

journal_name

Bone

journal_title

Bone

authors

Kaur M,Pearson D,Godber I,Lawson N,Baker P,Hosking D

doi

10.1016/s8756-3282(03)00017-6

subject

Has Abstract

pub_date

2003-04-01 00:00:00

pages

449-54

issue

4

eissn

8756-3282

issn

1873-2763

pii

S8756328203000176

journal_volume

32

pub_type

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