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Related Concept Videos

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...
Oogenesis01:22

Oogenesis

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.
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...
Infertility in Females01:28

Infertility in Females

Female infertility is defined as the inability to conceive after a year of regular, unprotected intercourse and affects about 10–15% of couples worldwide. The primary cause of female infertility is ovulatory disorders, which hinder the release of eggs. These disorders can be classified as hypothalamic amenorrhea, polycystic ovarian syndrome (PCOS), premature ovarian failure, and hyperprolactinemic anovulation disorders.
Endometriosis, a condition characterized by abnormal growth of endometrial...
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...
Ovarian Cycle01:27

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...
Disorders of the Female Reproductive System01:24

Disorders of the Female Reproductive System

The female reproductive system can be affected by several disorders, including Premenstrual Syndrome (PMS), Premenstrual Dysphoric Disorder (PMDD), endometriosis, and various forms of cancer. PMS and PMDD are cyclical conditions that cause physical and emotional distress, with symptoms that include edema, mood swings, and food cravings. PMDD is a more severe form of PMS characterized by increased symptom severity that peaks during the luteal phase and tends to improve or resolve shortly after...

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Updated: Jun 4, 2026

Z-Scores for Assessing Ovarian Reserve in Young Patients Undergoing Fertility Preservation
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Z-Scores for Assessing Ovarian Reserve in Young Patients Undergoing Fertility Preservation

Published on: October 25, 2024

Premature ovarian failure.

Kate Maclaran1, Nick Panay

  • 1Chelsea and Westminster Hospitals, London, UK.

The Journal of Family Planning and Reproductive Health Care
|March 4, 2011
PubMed
Summary

Premature ovarian failure (POF) affects women under 40, causing hormonal imbalances and significant health issues. This review covers POF

Area of Science:

  • Reproductive Endocrinology
  • Gynecology

Background:

  • Premature ovarian failure (POF) is characterized by amenorrhea, elevated gonadotropins, and hypoestrogenism in women under 40.
  • POF has significant physical and psychological consequences and is becoming more common due to improved cancer survival rates.
  • Despite its increasing prevalence, POF remains poorly understood.

Purpose of the Study:

  • To review the current understanding of POF presentation and investigation.
  • To discuss recent advancements in managing women with POF.
  • To identify areas for future research to improve knowledge of POF.

Main Methods:

  • Literature review of studies on premature ovarian failure.
  • Synthesis of information on clinical presentation and diagnostic approaches.

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Fertility Preservation in Patients with Severe Ovarian Dysfunction
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Fertility Preservation in Patients with Severe Ovarian Dysfunction

Published on: March 25, 2021

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Z-Scores for Assessing Ovarian Reserve in Young Patients Undergoing Fertility Preservation
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Z-Scores for Assessing Ovarian Reserve in Young Patients Undergoing Fertility Preservation

Published on: October 25, 2024

Fertility Preservation in Patients with Severe Ovarian Dysfunction
12:03

Fertility Preservation in Patients with Severe Ovarian Dysfunction

Published on: March 25, 2021

  • Analysis of current and emerging management strategies.
  • Identification of knowledge gaps and future research directions.

    • Main Results:

    • POF diagnosis relies on clinical signs (amenorrhea) and hormonal profiles (elevated FSH, low estrogen).
    • Management strategies are evolving, focusing on hormone replacement and addressing specific symptoms.
    • Further research is needed to elucidate underlying mechanisms and optimize long-term care.

    Conclusions:

    • POF requires comprehensive diagnostic evaluation and tailored management plans.
    • Advances in treatment offer improved quality of life for affected women.
    • Continued research is crucial to enhance understanding and therapeutic options for POF.