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Related Concept Videos

Hormonal Control of the Ovarian Cycle01:30

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...
Oogenesis02:07

Oogenesis

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...
Regulation of the Cardiovascular System01:27

Regulation of the Cardiovascular System

The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...
Psychoneuroimmunology: Cardiovascular Disease01:27

Psychoneuroimmunology: Cardiovascular Disease

Psychoneuroimmunology (PNI) is a multidisciplinary field that examines how psychological factors, particularly stress, interact with the immune system and impact physical health. Research in PNI has shown that chronic or traumatic stress can disrupt both the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system. These disruptions contribute to serious health conditions, including cardiovascular diseases.
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Ovaries01:26

Ovaries

The ovaries are roughly the size of almonds and measure approximately 2 to 3 centimeters in length. These paired structures are situated within the pelvic region and are anchored by the mesovarium—a peritoneal extension that also connects them to the wider structure of the broad ligament. The support system extends to the suspensory ligament, housing blood and lymphatic vessels. In addition, the ovarian ligament tethers the ovaries to the uterus.
On the ovarian surface, a layer of cuboidal...
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Ovarian Cycle

The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle length...

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Related Experiment Video

Updated: May 31, 2026

Doppler Ultrasonography for Live Imaging and Quantification of Ovarian Vascular Function in Mice
08:05

Doppler Ultrasonography for Live Imaging and Quantification of Ovarian Vascular Function in Mice

Published on: November 14, 2025

Cardiovascular disease and ovarian function.

Amanda N Kallen1, Lubna Pal

  • 1Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale University School of Medicine, New Haven, Connecticut 06510, USA.

Current Opinion in Obstetrics & Gynecology
|June 18, 2011
PubMed
Summary
This summary is machine-generated.

Coronary heart disease (CHD) risk in aging women is linked to ovarian hormones. While natural estrogen protects the heart, hormone therapy

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Orthotopic Ovarian Transplantation Procedures to Investigate the Life- and Health-span Influence of Ovarian Senescence in Female Mice
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Orthotopic Ovarian Transplantation Procedures to Investigate the Life- and Health-span Influence of Ovarian Senescence in Female Mice

Published on: February 12, 2018

Related Experiment Videos

Last Updated: May 31, 2026

Doppler Ultrasonography for Live Imaging and Quantification of Ovarian Vascular Function in Mice
08:05

Doppler Ultrasonography for Live Imaging and Quantification of Ovarian Vascular Function in Mice

Published on: November 14, 2025

Orthotopic Ovarian Transplantation Procedures to Investigate the Life- and Health-span Influence of Ovarian Senescence in Female Mice
06:49

Orthotopic Ovarian Transplantation Procedures to Investigate the Life- and Health-span Influence of Ovarian Senescence in Female Mice

Published on: February 12, 2018

Area of Science:

  • Cardiovascular Endocrinology
  • Reproductive Aging

Background:

  • Coronary heart disease (CHD) is a primary cause of mortality in aging women.
  • Ovarian hormones significantly influence a woman's CHD risk profile.

Purpose of the Study:

  • To review the current understanding of CHD risk in relation to ovarian physiology and senescence.
  • To explore the role of ovarian endocrinology in cardiovascular health and disease.

Main Methods:

  • Literature review of existing research on ovarian hormones and cardiovascular health.
  • Analysis of the impact of ovarian senescence on CHD risk.
  • Evaluation of the cardioprotective effects of endogenous and exogenous estrogens.

Main Results:

  • Endogenous ovarian estrogen provides cardiac and vascular protection against atherosclerosis.
  • The cardioprotective benefits of reproductive-age estrogen do not directly translate to postmenopausal hormone therapy.
  • Exogenous estrogen, when reintroduced near ovarian senescence, may potentially slow atherogenesis, but this requires further substantiation.

Conclusions:

  • Ovarian hormones are critical modulators of atherosclerosis and CHD.
  • Cessation of ovarian function leads to a rapid decline in the cardioprotective hormonal milieu.
  • The precise role, timing, and duration of exogenous hormone therapy for cardioprotection remain under investigation.