Related Experiment Video
Updated: Jul 9, 2026

A Hyperandrogenic Mouse Model to Study Polycystic Ovary Syndrome
Published on: October 2, 2018
The diagnosis of late life hypogonadism
1Division of Geriatric Medicine, Saint Louis University Medical Center, 1402 South Grand Boulevard, Saint Louis, MO 63104, USA. morley@slu.edu
Abstract:
The diagnosis of late life hypogonadism is controversial. For the purposes of discussion, it is suggested that treatment of late life hypogonadism requires the presence of symptoms, a low level of circulating free or bioavailable testosterone level and a positive response to treatment. While this may appear to be a radical proposal, we believe it represents the most rigorous scientific approach to the diagnosis of late life hypogonadism at the present time.
Related Concept Videos
Menopause
Disorders of the Male Reproductive System
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
Infertility in Males
Gonadal and Placental Hormones
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...
Hypertension III: Clinical Manifestations and Diagnostic Studies
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion