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Bone Disorders

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...

Skeleton and Calcium Homeostasis

Skeleton and Calcium Homeostasis

Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.

Hormones and Bone Tissue

Hormones and Bone Tissue

The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...

Bone Remodeling

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.

Essential Minerals for Bone Health

Essential Minerals for Bone Health

The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...

The Functions of the Skeletal System

The Functions of the Skeletal System

The most apparent functions of the skeletal system are support, protection, and movement. However, bone tissue also performs several other critical metabolic functions. For one, the bone matrix acts as a reservoir for a number of minerals important to the functioning of the body, especially calcium and phosphorus. These minerals, present in the bone tissue, can be released back into the bloodstream when required. Calcium ions, for example, are essential for muscle contractions and controlling...

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Calcium and bone disorders in pregnancy.

Shriraam Mahadevan¹, V Kumaravel, R Bharath

¹Department of Clinical Endocrinology, Dr. E. V. Kalyani Medical Centre, Chennai, India.

Indian Journal of Endocrinology and Metabolism

|May 26, 2012

Summary

Pregnancy and lactation significantly impact maternal bone health, altering calcium regulation. Unique adaptive mechanisms during these periods may pose risks, especially in populations with nutritional deficiencies.

Keywords:

Bone mineral calcium lactation osteoporosis pregnancy vitamin D

Related Experiment Videos

Area of Science:

Reproductive Endocrinology
Bone Mineral Metabolism
Maternal-Fetal Health

Background:

Pregnancy and lactation necessitate substantial calcium transfer to the fetus and infant, stressing maternal bone mineral homeostasis.
Maternal adaptive mechanisms differ: increased intestinal calcium absorption via calcitriol (1,25 dihydroxy vitamin D) during pregnancy, and skeletal resorption mediated by parathormone-related peptide (PTHrP) during lactation.

Purpose of the Study:

To explore the distinct maternal adaptive mechanisms for calcium conservation during pregnancy and lactation.
To investigate the potential long-term impact of pregnancy and lactation on maternal bone health, particularly in the Indian context.
To discuss the implications of metabolic bone diseases during pregnancy.

Main Methods:

Review of existing literature on calcium metabolism during pregnancy and lactation.
Analysis of factors influencing maternal bone health in specific populations (e.g., young Indian women).
Discussion of clinical management strategies for metabolic bone diseases in pregnancy.

Main Results:

Pregnancy utilizes increased intestinal calcium absorption, while lactation relies on skeletal resorption for calcium supply.
While generally not linked to future osteoporosis risk, pregnancy and lactation may pose unique bone health challenges in populations with nutritional deficits and vitamin D deficiency, especially when occurring before peak bone mass attainment.
Metabolic bone diseases are rare but require specific management during pregnancy.

Conclusions:

Maternal calcium homeostasis undergoes significant, period-specific adaptations during pregnancy and lactation.
The interplay of early pregnancy, nutritional status, and vitamin D deficiency in certain populations may increase future osteoporosis risk.
Early intervention and prevention strategies are crucial for safeguarding maternal bone health.