Hormonal Contraceptives and Bone Health Dynamics
Summary
Hormonal contraceptives encompass combined oestrogen–progestogen preparations, progestogen-only formulations and long-acting reversible devices. By altering endogenous hormone profiles and hepatic synthesis of growth factors, these agents interact with the bone remodelling cycle in age- and dose-dependent ways. Oestrogenic components generally inhibit bone resorption by decreasing osteoclast activity, while progestogens may promote osteoblast differentiation and matrix deposition. Variations in hormone dose, formulation and route of administration yield divergent effects on bone mineral density, turnover markers and microarchitecture. Critical windows such as adolescence, peak bone mass accrual and perimenopause exhibit heightened skeletal sensitivity. Suppression of the growth hormone–insulin-like growth factor-I axis, differential changes in osteocalcin and procollagen propeptides, and shifts in trabecular and cortical compartments underpin observed alterations in bone strength and fracture risk. A nuanced understanding of these dynamics is essential for tailoring contraceptive choice to individual bone-health profiles and for informing global strategies in reproductive health management.
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Hormonal Contraceptives and Bone Health Dynamics publication trend
The graph below shows the total number of articles in hormonal contraceptives and bone health dynamics across all publications each year (not limited to Nature Index journals).
Technical terms
Bone mineral density (BMD): The amount of mineral per unit area of bone, typically measured by dual-energy X-ray absorptiometry.
Bone mineral content (BMC): The total mineral mass within a defined bone region, reflecting overall bone mass rather than density.
Osteocalcin: A non-collagenous protein secreted by osteoblasts, serving as a marker of bone formation and mineralisation.
Procollagen type I N-terminal propeptide (PINP): A by-product of type I collagen synthesis, used as a sensitive indicator of new bone matrix formation.
Trabecular microarchitecture: The three-dimensional structural organisation of the spongy inner bone, crucial for strength and resistance to fracture.
References
- Hormonal and non-hormonal oral contraceptives given long-term to pubertal rats differently affect bone mass, quality and metabolism. Frontiers in Endocrinology (2023).
- Progesterone and Bone: Actions Promoting Bone Health in Women. Journal of Osteoporosis (2010).
- Are the Effects of Oral and Vaginal Contraceptives on Bone Formation in Young Women Mediated via the Growth Hormone-IGF-I Axis?. Frontiers in Endocrinology (2020).
- Bone impact after two years of low-dose oral contraceptive use during adolescence. PLOS ONE (2023).
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