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Related Concept Videos

Signs of Puberty01:27

Signs of Puberty

334
Puberty is a critical phase, typically beginning between the ages of 8 and 13 in girls and 9 and 14 in boys, though timing can vary based on genetics, environmental factors, and overall health. This period is characterized by the development of secondary sexual characteristics and the attainment of reproductive potential. Endocrine changes underpin puberty, with hormonal surges of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) instigated by Gonadotropin-Releasing Hormone (GnRH)...
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Psychosexual Stages of Personality: Latency01:16

Psychosexual Stages of Personality: Latency

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Following the phallic stage in Freud's theory of psychosexual development, children enter a phase called the latency period, which lasts from approximately six to twelve years of age. Unlike earlier stages, where sexual impulses played a central role, Freud believed these impulses are repressed during the latency period, becoming part of the unconscious. This stage is often described as a time of psychological calm after the turbulence of the phallic stage.
The latency period is not...
442
Menopause01:28

Menopause

156
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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Hormonal Control of the Ovarian Cycle01:30

Hormonal Control of the Ovarian Cycle

476
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...
476
Psychosexual Stages of Personality: Genital01:23

Psychosexual Stages of Personality: Genital

616
The genital stage is the final phase of Sigmund Freud's theory of psychosexual development, beginning at puberty, around age 12. During this stage, sexual energy shifts from self-focused interests to external individuals, marking the development of mature adult sexuality. Freud saw this phase as a time of sexual reawakening, with desires directed toward others outside the family. A healthy transition into this stage, according to Freud, signifies the emergence of two key aspects of adult...
616
Hormonal Regulation of the Menstrual Cycle01:22

Hormonal Regulation of the Menstrual Cycle

346
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...
346

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Related Experiment Video

Updated: Jun 27, 2025

Determination of Reproductive Competence by Confirming Pubertal Onset and Performing a Fertility Assay in Mice and Rats
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Normal Puberty.

Kanthi Bangalore Krishna1, Selma F Witchel1

  • 1Division of Pediatric Endocrinology and Diabetes, UPMC Childrens Hospital of Pittsburgh, Pittsburgh, PA, USA.

Endocrinology and Metabolism Clinics of North America
|April 27, 2024
PubMed
Summary
This summary is machine-generated.

Puberty involves gonadarche and adrenarche, impacting adult health. Understanding these pubertal processes is key to clarifying links between timing and later cardiovascular, metabolic, and reproductive outcomes.

Keywords:
Follicle-stimulating hormoneGonadarcheGonadotropin-releasing hormoneKisspeptin-neurokinin B-dynorphin neuronsLuteinizing hormonePuberty

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Area of Science:

  • Endocrinology
  • Human Physiology
  • Reproductive Health

Background:

  • Puberty is marked by gonadarche (gonadal maturation) and adrenarche (adrenal maturation).
  • Gonadarche involves the reactivation of the hypothalamic-pituitary-gonadal axis after childhood quiescence.
  • Adrenarche signifies pubertal adrenal maturation, leading to pubic hair and body odor.

Purpose of the Study:

  • To detail the processes of gonadarche and adrenarche.
  • To elucidate the relationship between the timing of puberty onset and adult health outcomes.
  • To identify factors influencing the onset of gonadarche.

Main Methods:

  • Review of neuroendocrine, genetic, metabolic, and environmental factors influencing puberty.
  • Analysis of hormonal changes associated with gonadarche and adrenarche.
  • Correlation of pubertal timing with adult health markers.

Main Results:

  • Gonadarche involves increased secretion of gonadotropin-releasing hormone, luteinizing hormone, and follicle-stimulating hormone.
  • Adrenarche is indicated by the development of pubic hair, axillary hair, and apocrine odor.
  • Factors such as neuroendocrine signals, genetics, metabolism, and environment influence gonadarche onset.

Conclusions:

  • Understanding gonadarche and adrenarche is crucial for clarifying links to adult health.
  • The timing of puberty onset has implications for cardiovascular, metabolic, and reproductive health.
  • Further research into the influencing factors of puberty onset is warranted.