Related Experiment Video

Updated: Oct 2, 2026

Gonadectomy and Blood Sampling Procedures in the Small Size Teleost Model Japanese Medaka (Oryzias latipes)
05:31

Gonadectomy and Blood Sampling Procedures in the Small Size Teleost Model Japanese Medaka (Oryzias latipes)

Published on: December 11, 2020

Feedback effects of steroids on gonadotrophin release in hyperprolactinaemic, ovariectomized rats

D A Carter, S A Whitehead

    The Journal of Endocrinology
    |June 1, 1981
    PubMed

    More Related Videos

    Exploring Independent Effects of Follicle-Stimulating Hormone In Vivo in a Mouse Model05:32

    Exploring Independent Effects of Follicle-Stimulating Hormone In Vivo in a Mouse Model

    Published on: August 11, 2023

    Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies06:24

    Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

    Published on: January 10, 2025

    Related Concept Videos

    Feedback Loops01:01

    Feedback Loops

    In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
    Hypothalamic-Pituitary Axis01:37

    Hypothalamic-Pituitary Axis

    The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
    Hormones of the Pituitary Gland01:27

    Hormones of the Pituitary Gland

    The small, pea-sized pituitary gland is located at the base of the brain. It is crucial in regulating various bodily functions, from growth to reproduction. The gland is divided into the anterior lobe and the posterior lobe. The secretory cell clusters in the pars distalis of the anterior pituitary lobe are controlled by hypothalamic regulators and synthesize six primary hormones.
    The most abundantly secreted hormone from the anterior lobe is the growth hormone, which controls overall growth by...
    Gonadal and Placental Hormones01:24

    Gonadal and Placental Hormones

    The gonads, namely the testes in males and the ovaries in females, are pivotal in producing gonadal hormones that orchestrate the intricate processes of sexual development and reproduction.
    In males, testosterone is the primary gonadal androgen. It plays a central role in the maturation of male reproductive organs — the penis and testes. Additionally, testosterone is instrumental in the development of secondary sexual characteristics — a deep voice as well as facial and pubic hair growth — and...
    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.
    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...