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Related Concept Videos

Menses Phase01:18

Menses Phase

The uterine cycle begins with the menstrual phase, which is considered day one of the cycle and typically lasts about five days. This phase is characterized by the degeneration and shedding of the stratum functionalis, the functional layer of the endometrium.
When fertilization does not occur, the corpus luteum deteriorates, causing a significant drop in the levels of estrogen and progesterone in the body. This hormonal decrease triggers the release of prostaglandins, which cause the uterine...
The Menstrual Cycle01:19

The Menstrual Cycle

The menstrual cycle is a recurrent sequence of changes in the uterine endometrium, specifically its functional layer, the stratum functionalis. This cycle prepares the uterus for potential pregnancy. This cycle typically spans 21–35 days, averaging 28 days, and aligns with the ovarian cycle, regulated by fluctuating levels of ovarian hormones, primarily estrogen and progesterone.
The menstrual phase occurs from days 1 to 5 and involves the shedding of the stratum functionalis, as a uterine...
Hormonal Regulation of the Menstrual Cycle01:22

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.
Menopause01:28

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...
Secretory Phase01:19

Secretory Phase

The secretory phase of the menstrual cycle, spanning from day 14 to 28 in a typical 28-day cycle, is a period of significant physiological changes in the female reproductive system. This phase commences immediately after ovulation and is characterized by the preparation of the endometrium for potential embryo implantation.
Following ovulation, the corpus luteum, a temporary endocrine structure, produces progesterone and estrogens. These hormones stimulate the growth and coiling of endometrial...
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...

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Related Experiment Video

Updated: May 31, 2026

Ex Vivo Method for Assessing the Mouse Reproductive Tract Spontaneous Motility and a MATLAB-based Uterus Motion Tracking Algorithm for Data Analysis
06:22

Ex Vivo Method for Assessing the Mouse Reproductive Tract Spontaneous Motility and a MATLAB-based Uterus Motion Tracking Algorithm for Data Analysis

Published on: September 1, 2019

Menstrual function in sports.

Nikolaos D Roupas1, Neoklis A Georgopoulos

  • 1Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology, Patras University Medical School, Patras, Greece.

Hormones (Athens, Greece)
|July 5, 2011
PubMed
Summary

Exercise-related reproductive dysfunction in athletes is complex and multifactorial. Early diagnosis and individualized management are crucial for preserving bone mass in female athletes experiencing menstrual irregularities.

Area of Science:

  • Sports Medicine
  • Reproductive Endocrinology
  • Exercise Physiology

Background:

  • Menstrual function in female athletes is influenced by exercise, leading to reproductive dysfunction.
  • Understanding the pathophysiology, evaluation, and management of these conditions is critical.

Purpose of the Study:

  • To review recent advancements in understanding exercise-related reproductive dysfunction in athletes.
  • To provide an overview of current knowledge on pathophysiology, evaluation, and management strategies.

Main Methods:

  • A comprehensive literature search of PubMed (1980-2010) was conducted.
  • Articles focusing on exercise, athletes, menstrual function, and amenorrhea were reviewed.
  • The review synthesized information on pathophysiology, clinical manifestations, and treatment options.

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Skeletal Muscle Gender Dimorphism from Proteomics
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Skeletal Muscle Gender Dimorphism from Proteomics

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Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players
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Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players

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Related Experiment Videos

Last Updated: May 31, 2026

Ex Vivo Method for Assessing the Mouse Reproductive Tract Spontaneous Motility and a MATLAB-based Uterus Motion Tracking Algorithm for Data Analysis
06:22

Ex Vivo Method for Assessing the Mouse Reproductive Tract Spontaneous Motility and a MATLAB-based Uterus Motion Tracking Algorithm for Data Analysis

Published on: September 1, 2019

Skeletal Muscle Gender Dimorphism from Proteomics
09:29

Skeletal Muscle Gender Dimorphism from Proteomics

Published on: December 14, 2011

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players
10:08

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players

Published on: June 10, 2025

Main Results:

  • Exercise-related reproductive dysfunction is multifactorial and often a diagnosis of exclusion.
  • Adipose tissue plays a significant endocrine role in regulating metabolism and reproduction.
  • Clinical presentations vary from delayed menarche to secondary amenorrhea, with amenorrhea posing the most serious risk to bone health.

Conclusions:

  • Amenorrhea in athletes is linked to bone pathology, necessitating early intervention.
  • Management strategies are individualized, including lifestyle adjustments and pharmacologic treatments.
  • Preserving bone mass requires timely diagnosis, comprehensive evaluation, and tailored management plans.