This video can not be played

US Defence Secretary Pete Hegseth has announced that all military personnel aged 30 and over will be screened for testosterone deficiency as part of their annual health checks. Those found to have low testosterone levels will be offered voluntary testosterone replacement therapy.

Service members under 30 will be able to opt in for testing. The Pentagon is silent on whether hormone replacement therapy will be available to women.

The move follows a broader push by the Trump administration to make it easier for medical professionals to prescribe testosterone to men.

The BBC's Gary O'Donoghue examines what the policy reveals about Hegseth's vision for a more "manly" military.

How testosterone testing will work in Hegseth's 'manly' military. Video, 00:01:07How testosterone testing will work in Hegseth's 'manly' military

Up Next. Hegseth announces testosterone deficiency screening for troops. Video, 00:01:06Hegseth announces testosterone deficiency screening for troops

Watch: Flood waters surge in Texas after huge rainstorms. Video, 00:00:34Watch: Flood waters surge in Texas after huge rainstorms

Watch: What to know as Genoa bridge disaster trial ends. Video, 00:01:16Watch: What to know as Genoa bridge disaster trial ends

Starmer given Order of Freedom medal in final Ukraine trip as PM. Video, 00:01:05Starmer given Order of Freedom medal in final Ukraine trip as PM

Moment US Navy jet stuns packed Florida beach with low flypast. Video, 00:00:23Moment US Navy jet stuns packed Florida beach with low flypast

Dramatic video shows wildfire surround freight train in Canada. Video, 00:00:38Dramatic video shows wildfire surround freight train in Canada

Watch: TikTok legend Gangster Granny on her love for Messi. Video, 00:00:46Watch: TikTok legend Gangster Granny on her love for Messi

Argentina fans celebrate World Cup win over England. Video, 00:01:14Argentina fans celebrate World Cup win over England

What if Bluey spoke one of the world's oldest living languages? Video, 00:01:13What if Bluey spoke one of the world's oldest living languages?

Watch: Starmer's kind send-off across the Commons in final PMQs. Video, 00:01:32Watch: Starmer's kind send-off across the Commons in final PMQs

Watch: The clash between US and Iran for control of the Strait of Hormuz. Video, 00:01:42Watch: The clash between US and Iran for control of the Strait of Hormuz

Wife describes moment husband nearly sucked out of Ryanair plane. Video, 00:00:27Wife describes moment husband nearly sucked out of Ryanair plane

Watch: Horses evacuated as fire approaches riding centre near Paris. Video, 00:00:41Watch: Horses evacuated as fire approaches riding centre near Paris