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The Effects of Semaglutide vs Testosterone Replacement Therapy on Functional Hypogonadism and Sperm Quality in Men With Type 2 Diabetes Mellitus and Obesity

NCT06489457 · Completed

Last updated 2026-05-28

This clinical trial compares the effects of semaglutide and testosterone replacement therapy on semen volume in men with type 2 diabetes, obesity, and low testosterone levels.

Status Completed The study has finished.
Phase Phase 3 Confirms effectiveness in a large group before approval.
Type Interventional (clinical trial)
Design Randomized, open-label (no blinding) treatment study
Participants 25 people
Who can join Ages 18–65 · male only
Timeline Started 2020-09 · est. completion 2023-06
Where 1 site · Slovenia

What this study is testing ClinicalTrials.gov NCT06489457 ↗

Description as written by the study sponsor.

The goal of this study is to learn whether semaglutide (treatment for type 2 diabetes and obesity) can improve signs and symptoms of hypogonadism in men with type 2 diabetes, obesity and hypogonadism (a condition when levels of testosterone are decreased). The main questions the study aims to answer are: * Does semaglutide improve the quality of sperm? * Does semaglutide improve symptoms of hypogonadism as well as testosterone replacement? The researchers will compare semaglutide to testosterone replacement to see which drug better treats symptoms of hypogonadism. * The participants will receive testosterone replacement therapy (intramuscular injection every 10-12 weeks) or magnitude (subcutaneous injection once a week). * The treatment will last 24 weeks. * The participants will visit the clinic at the start and the end of the study. At the visit, the researchers will measure body weight and take a few blood samples. The participants will also be asked to complete several questionnaires and collect a sperm sample. The participants are free to terminate their participation in the study at any time without giving a reason.

Treatments tested

Main thing measuredChange in semen volume from baseline and between the treatment arms
SponsorUniversity Medical Centre Ljubljana
Conditions studiedType 2 Diabetes Mellitus, Obesity, Functional Hypogonadism
GLP-1 drugs semaglutide

Full protocol, eligibility, and contacts on ClinicalTrials.gov NCT06489457 ↗