Related Experiment Video

Updated: Aug 8, 2026

Ovariectomy and 17β-estradiol Replacement in Rats and Mice: A Visual Demonstration
06:51

Ovariectomy and 17β-estradiol Replacement in Rats and Mice: A Visual Demonstration

Published on: June 7, 2012

Subdermal levonorgestrel implants: serum androgens

M I Osman, M I Abdalla, M H Toppozada

    Contraceptive Delivery Systems
    |April 1, 1983
    PubMed

    Keywords:
    Age FactorsAndrogens--analysisBiologyContraceptionContraceptive AgentsContraceptive Agents, FemaleContraceptive Agents, ProgestinContraceptive Agents--administraction and dosageContraceptive MethodsEndocrine SystemFamily PlanningHormonesInjectablesLevonorgestrel--administraction and dosageParityPhysiologyReproductive Control AgentsTestosterone

    More Related Videos

    Renal Capsule Xenografting and Subcutaneous Pellet Implantation for the Evaluation of Prostate Carcinogenesis and Benign Prostatic Hyperplasia08:38

    Renal Capsule Xenografting and Subcutaneous Pellet Implantation for the Evaluation of Prostate Carcinogenesis and Benign Prostatic Hyperplasia

    Published on: August 28, 2013

    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

    Hormones of the Adrenal Glands01:31

    Hormones of the Adrenal Glands

    Adrenal hormones play a pivotal role in maintaining the body's electrolyte balance and orchestrating responses to stress, showcasing the intricate functions of the adrenal cortex and medulla.
    The adrenal cortex, a powerhouse of hormone synthesis, generates over two dozen corticosteroid hormones. The zona glomerulosa produces mineralocorticoids, exemplified by aldosterone, influencing the electrolyte composition of body fluids. The synthesis of glucocorticoids such as cortisol and corticosterone...
    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...
    Birth Control Methods01:22

    Birth Control Methods

    Vasectomy is a surgical form of male sterilization that involves severing and sealing the vasa deferentia, preventing sperm from mixing with semen during ejaculation. Because a vasectomy does not impact the testes' ability to produce testosterone, hormone levels, libido, and sexual function generally remain unchanged. While vasectomy is highly effective in preventing pregnancy, with a success rate near 99.85%, rare cases of recanalization (spontaneous reconnection) can occur. Although vasectomy...
    Parenteral Drug Delivery Systems: Injectables, Implants, and Infusion Devices01:28

    Parenteral Drug Delivery Systems: Injectables, Implants, and Infusion Devices

    Parenteral drug delivery systems play a crucial role in modern therapeutics by enabling the direct administration of drugs into the systemic circulation, bypassing the gastrointestinal tract. These systems are particularly valuable for poorly absorbed oral medications that are unstable in the digestive environment or require rapid onset or sustained therapeutic levels. Delivery is achieved through intravenous, intramuscular, or subcutaneous routes, each selected based on the drug's properties...
    Intrauterine Drug Delivery Systems01:21

    Intrauterine Drug Delivery Systems

    Controlled-release systems for intravaginal and intrauterine drug delivery have been developed primarily for the administration of contraceptive steroid hormones. These delivery routes circumvent first-pass hepatic metabolism, thereby enhancing bioavailability and allowing for reduced systemic dosages compared to oral administration. Such approaches contribute to improved therapeutic efficacy and patient compliance, particularly in long-term contraceptive regimens.Intravaginal Drug Delivery...
    Glucagon-like Receptor Agonists01:24

    Glucagon-like Receptor Agonists

    Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
    GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by the...