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Related Concept Videos

Menopause01:28

Menopause

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Menopause, a natural biological process marking the end of a woman's fertility, typically occurs between the fifth and sixth decade of life. This phase is characterized by the exhaustion of the ovarian follicle pool, leading to less responsive ovaries despite the high levels of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). The consequential decrease in estrogen production results in symptoms like hot flashes, heavy sweating, headaches, hair loss, muscle pains, vaginal...
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Bone Disorders01:29

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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...
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Bone Remodeling01:40

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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.
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Oogenesis02:07

Oogenesis

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In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
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Oogenesis01:22

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Oogenesis,  the process of developing egg cells (female gametes), occurs within the ovaries and is fundamental to female fertility. This sequence begins during fetal development when diploid oogonia in the developing ovaries undergo mitotic divisions to produce primary oocytes. By birth, these primary oocytes enter prophase I of meiosis but become arrested in this stage, remaining suspended until puberty.
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Hormonal Control of the Ovarian Cycle01:30

Hormonal Control of the Ovarian Cycle

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The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle.  At puberty, GnRH secretion increases in both frequency and...
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Related Experiment Video

Updated: Nov 4, 2025

Author Spotlight: Integrating Traditional Chinese Medicine with Modern Pharmacology and Genomics for Assessing Postmenopausal Osteoporosis in Mice
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Author Spotlight: Integrating Traditional Chinese Medicine with Modern Pharmacology and Genomics for Assessing Postmenopausal Osteoporosis in Mice

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Premenopausal osteoporosis.

M Conradie1, T de Villiers2,3

  • 1Department of Medicine, Division of Endocrinology, Stellenbosch University, Cape Town, South Africa.

Climacteric : the Journal of the International Menopause Society
|May 26, 2021
PubMed
Summary
This summary is machine-generated.

Dual-energy X-ray absorptiometry is not recommended for diagnosing or treating osteoporosis in premenopausal women. Focus on fragility evidence and secondary causes for diagnosis, not universal screening.

Keywords:
Premenopausal osteoporosisbisphosphonatesbone mass densityfragility fracturessecondary causes

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Area of Science:

  • Endocrinology
  • Bone Metabolism
  • Women's Health

Background:

  • Premenopausal osteoporosis diagnosis and treatment lack clear guidelines.
  • Dual-energy X-ray absorptiometry (DXA) is often misapplied in this demographic.
  • Idiopathic osteoporosis in young women is rare, suggesting underlying causes.

Purpose of the Study:

  • To clarify diagnostic and treatment strategies for osteoporosis in premenopausal women.
  • To emphasize the importance of identifying secondary causes of bone loss.
  • To review current evidence on therapeutic interventions.

Main Methods:

  • Literature review and synthesis of existing guidelines and studies.
  • Analysis of diagnostic criteria and treatment efficacy.
  • Evaluation of secondary causes like hypoestrogenism and glucocorticoid use.

Main Results:

  • DXA should not be the sole diagnostic tool; fragility evidence is key.
  • Secondary causes, including hypoestrogenism and glucocorticoids, are common.
  • While some therapies increase bone density, fracture prevention data is limited.

Conclusions:

  • Premenopausal osteoporosis diagnosis requires fragility evidence and exclusion of secondary causes.
  • Management focuses on lifestyle, treating secondary causes, and addressing hypoestrogenism.
  • Long-term safety and fracture prevention efficacy of bone-specific therapies remain uncertain.