Trump Administration’s Definitions of Sex Defy Science

The government wants to limit a person’s sex to male or female as determined by genitalia at birth and genetics. It’s not so simple, say scientists.

| 2 min read

Register for free to listen to this article
Listen with Speechify
0:00
2:00
Share

ABOVE: © ISTOCK.COM, IPGGUTENBERGUKLTD

According to a leaked memo from the Department of Health and Human Services, President Donald Trump’s administration wants to legally define sex as “either male or female, unchangeable, and determined by the genitals that a person is born with,” The New York Times reports, adding that disputes about sex would be resolved through genetic testing. Many people are concerned this policy could be used to roll back civil rights protections for transgender and nonbinary individuals and would, the Times reports, “essentially eradicate federal recognition of the estimated 1.4 million Americans who have opted to recognize themselves—surgically or otherwise—as a gender other than the one they were born into.”

In addition, some scientists say the guidelines disregard science.

“This proposed change pushes pseudoscience,” Kathleen Rest, executive director of the Union of Concerned Scientists, says in a statement. “It’s baseless and wrong for [Health and Human Services] to ...

Interested in reading more?

Become a Member of

The Scientist Logo
Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member? Login Here

Keywords

Meet the Author

  • Ashley P. Taylor

    This person does not yet have a bio.
Share
Image of small blue creatures called Nergals. Some have hearts above their heads, which signify friendship. There is one Nergal who is sneezing and losing health, which is denoted by minus one signs floating around it.
June 2025, Issue 1

Nergal Networks: Where Friendship Meets Infection

A citizen science game explores how social choices and networks can influence how an illness moves through a population.

View this Issue
An illustration of green lentiviral particles.

Maximizing Lentivirus Recovery

cytiva logo
Unraveling Complex Biology with Advanced Multiomics Technology

Unraveling Complex Biology with Five-Dimensional Multiomics

Element Bioscience Logo
Resurrecting Plant Defense Mechanisms to Avoid Crop Pathogens

Resurrecting Plant Defense Mechanisms to Avoid Crop Pathogens

Twist Bio 
The Scientist Placeholder Image

Seeing and Sorting with Confidence

BD

Products

The Scientist Placeholder Image

Agilent Unveils the Next Generation in LC-Mass Detection: The InfinityLab Pro iQ Series

The Scientist Placeholder Image

Agilent Announces the Enhanced 8850 Gas Chromatograph

parse-biosciences-logo

Pioneering Cancer Plasticity Atlas will help Predict Response to Cancer Therapies