Related Experiment Videos
Calcium-regulating hormones and osteocalcin levels during pregnancy: a longitudinal study
1Department of Obstetrics and Gynecology, National Defense Medical College, Saitama, Japan.
American Journal of Obstetrics and Gynecology
|May 1, 1991
Summary
Pregnancy hormone levels change significantly, with 1,25-dihydroxyvitamin D increasing and parathyroid hormone initially decreasing then rising. These shifts impact osteocalcin, a key bone health marker, during gestation.
Area of Science:
- Endocrinology
- Obstetrics
- Bone Metabolism
Background:
- Calcium-regulating hormones and osteocalcin are crucial for bone health.
- Pregnancy involves significant physiological changes affecting mineral metabolism.
Purpose of the Study:
- To longitudinally measure serum concentrations of calcium-regulating hormones and osteocalcin in pregnant women.
- To understand the dynamic interplay of these hormones throughout pregnancy.
Main Methods:
- Longitudinal study design.
- Measurement of serum 1,25-dihydroxyvitamin D, parathyroid hormone, and osteocalcin levels in 20 women.
- Analysis of hormone correlations throughout gestation.
Main Results:
- 1,25-dihydroxyvitamin D levels increased with advancing pregnancy.
- Parathyroid hormone and osteocalcin levels were initially low, declined mid-pregnancy, and increased in late pregnancy.
- Serum osteocalcin levels correlated with parathyroid hormone levels.
Conclusions:
- Early/mid-pregnancy 1,25-dihydroxyvitamin D's effect on osteocalcin synthesis may be inhibited by declining parathyroid hormone.
- Late pregnancy increases in both parathyroid hormone and 1,25-dihydroxyvitamin D may drive the rise in osteocalcin.
- Hormonal dynamics during pregnancy significantly influence bone turnover markers.