Overview

• Skin-to-skin contact with parents using testosterone gel has been shown to transfer potent hormones to babies, causing reversible endocrine effects.
• A notable Swedish case involved a 10-month-old girl whose clitoral enlargement and labial fusion returned to normal after her father stopped accidental exposure.
• In 2023 the UK’s Medicines and Healthcare products Regulatory Agency required warning labels on testosterone gels and advised users to wash treated areas and avoid direct contact with children.
• The popularity of testosterone replacement therapy has expanded into younger demographics, increasing the potential for secondary exposure risks in households.
• Medical experts continue to stress strict application protocols, immediate hand washing and covering of treated skin to protect vulnerable family members.