Related Experiment Video
Updated: Aug 27, 2026

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
Published on: February 3, 2014
[Voice disorders following the use of hormonal contraceptives]
Abstract:
Voice disorders due to hormonal contraceptives in twenty-six patients are reported. All patients are working in occupations with a strong use for their voices especially of the singing voice. The disorders are primarily caused by norsteroid containing preparations (Non-Ovlon). Therefore these preparations should not be applied for patients in voice professions. With regard to good prophylactic measures and an early diagnosis a regular joint gynaecological and phoniatric examination is recommended.
Related Concept Videos
Hormonal Regulation
Larynx
Anatomy of the Larynx
The larynx consists of various components, including cartilage, muscles, and vocal cords. Its structure includes three large unpaired cartilages—the thyroid, cricoid, and epiglottis—and three smaller paired cartilages—the arytenoids, corniculates, and...
Hormonal Regulation of the Menstrual Cycle
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 Cycle
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...
Disorders of the Female Reproductive System
Birth Control Methods

