Changes in bone density and metabolism in pregnancy.
Acta Obstet Gynecol Scand
; 84(4): 349-54, 2005 Apr.
Article
em En
| MEDLINE
| ID: mdl-15762964
ABSTRACT
OBJECTIVE:
The impact of pregnancy on maternal bone density remains unclear. As a prerequisite to investigate the pathophysiology of gestational bone metabolism, we sought to document the changes in bone metabolism biochemistry in conjunction with those in selective trabecular/cortical osteodensitometry between early and late pregnancy.METHODS:
A prospective, controlled study in a university hospital was conducted with 43 healthy women, 34 of them during uneventful pregnancy. The main outcome measures are trabecular and cortical bone density measured in the first and third trimesters using peripheral quantitative computed tomography in conjunction with a panel of bone metabolism parameters, including blood parathyroid hormone, calcitonin, osteocalcin, skeletal alkaline phosphatase, and the urinary desoxypyridinoline/creatinine ratio.RESULTS:
Cortical bone density was unaffected by pregnancy. Trabecular bone density changes showed wide interindividual variation, ranging from +1.3 to -20.7% per year, identified as fast losers (less than -3%) and slow losers (more than -3%). Serum osteocalcin levels were lower in slow versus fast bone losers in both trimesters (first P=0.02, third P=0.02) and were the only independent parameter to differentiate between fast and slow losers.CONCLUSIONS:
Our data suggest that wide interindividual variation and the failure to provide a separate measure of trabecular bone density account for the conflicting evidence in earlier reports. Serum osteocalcin concentration during the first trimester distinguishes between fast and slow losers of trabecular bone and should be evaluated in future studies as predictor for later bone loss (osteoporosis).
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Base de dados:
MEDLINE
Assunto principal:
Rádio (Anatomia)
/
Gravidez
/
Densidade Óssea
/
Remodelação Óssea
Tipo de estudo:
Observational_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Adult
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Female
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Humans
Idioma:
En
Revista:
Acta Obstet Gynecol Scand
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
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