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Menopause

Menopause

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...

Hormonal Regulation of the Menstrual Cycle

Hormonal Regulation of the Menstrual Cycle

The ovarian cycle regulates endometrial changes throughout a single menstrual cycle via the coordinated action of gonadotrophin-releasing hormone (GnRH) and gonadotrophins.
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.

Hormonal Control of the Ovarian Cycle

Hormonal Control of the Ovarian Cycle

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...

Proliferative Phase

Proliferative Phase

The proliferative phase typically occurs after menstruation and lasts between 6 to 13 days in a standard 28-day cycle. This phase involves the reconstruction of the endometrium, guided by estrogen produced by the developing ovarian follicle.
Notably, the stratum basale, the basal layer of the endometrium, including the basal parts of the uterine glands, remains unaffected by menstruation. Stem cells in this layer undergo mitosis, regenerating the stratum functionalis and thickening the...

Hormonal Regulation

Hormonal Regulation

The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.

Hormonal Regulation

Hormonal Regulation

Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.

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Related Experiment Video

Updated: Jul 9, 2026

An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause

An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause

Published on: August 13, 2019

Menopause: developing a rational treatment plan.

Danielle Vitiello¹, Frederick Naftolin, Frederick Naftoilin

¹Division of Reproductive Endocrinology, Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, Connecticut, USA.

Gynecological Endocrinology : the Official Journal of the International Society of Gynecological Endocrinology

|December 14, 2007

Summary

This summary is machine-generated.

Menopause is a normal life stage. A personalized approach to menopausal hormone therapy (MHT) considering risks, benefits, and individual patient factors is crucial for safe and effective care during this transition.

Related Experiment Videos

Last Updated: Jul 9, 2026

An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause

An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause

Published on: August 13, 2019

Area of Science:

Women's Health
Endocrinology
Reproductive Health

Background:

Menopause is a natural developmental stage influenced by biological, psychological, and social factors.
Conflicting data on menopausal hormone therapy (MHT) necessitates re-evaluating disease prevention and menopausal health strategies.
Individual patient attitudes and expectations significantly impact decisions regarding menopausal hormone therapy (HT).

Purpose of the Study:

To reassess established paradigms of disease prevention and menopausal health.
To explore a rational approach to menopausal hormone therapy (HT).
To guide patients safely through the menopausal transition.

Main Methods:

Utilizing extensive patient history.
Employing quality-of-life questionnaires.
Leveraging powerful biological profiling.

Main Results:

Conflicting data on menopausal hormone therapy (MHT) requires careful consideration.
Patient decisions on MHT involve risk-benefit analysis and personal expectations.
A personalized approach to MHT is indicated.

Conclusions:

A rational approach to menopausal hormone therapy (HT) can be developed.
Integrating patient history, quality-of-life data, and biological profiling is key.
Safely guiding women through the menopausal transition is achievable with personalized care.