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A fetus in utero from Gray's Anatomy.

Fetal Testosterone May Program Boys' Behavior

By Live Science Staff last updated

Testosterone levels in the womb might program certain behaviors later in life, new research shows.

Sex
honey dripper placed in a small pool of honey on a blank background

Honey marketed for 'sexual enhancement' could be dangerous, FDA warns

By Nicoletta Lanese published

The FDA sent warning letters to four companies.

Sex
Waving a transgender flag during a gay pride march.

What does transgender mean?

By Alina Bradford, Timothy Williamson published

Reference The term transgender describes people whose gender identity differs from the sex to which they were assigned at birth.

Reference
Conceptual image of sperm

Why do some animals have sperm 20 times the length of their bodies?

By Cameron Duke published

Sperm come in tons of sizes, and it all has to do with how they have to find the egg.

Sex
A teacher points to a diagram of female reproductive organs projected on a screen in a classroom in a scene from Human Growth, an education film on sex education shown to students in Oregon junior high schools beginning in 1948.

Porn is the top source of 'sex education' for young adults

By Stephanie Pappas published

Pornography was listed as the top source of information about sex for 18- to 24-year-olds, a troubling ranking given that pornography is not meant as sex education.

Sex
sperm swimming in a corkscrew motion

Sperm don't swim anything like we thought they did, new study finds

By Stephanie Pappas published

New high-speed video reveals human sperm don't swim like we thought.

Sex
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Why do women have orgasms?

By Isobel Whitcomb published

There are a number of ideas about why the female orgasm happens.

Sex
A person holding a razor and a wax strip.

Removing Pubic Hair Probably Won't Increase Your Risk of STDs, Study Finds

By Rachael Rettner published

Removing pubic hair may not increase your risk of sexually transmitted diseases, according to a small new study.

Sex
Lichen growing on a rock.

Men Are Being Warned Not to Eat Lichen Touted as 'Natural Viagra'

By Rachael Rettner published

Experts in New Zealand are warning men not to consume a type of lichen that's been touted as a natural treatment for erectile dysfunction.

Sex
A steaming bowl

Woman Gets Second-Degree Burns from 'Vaginal Steaming'

By Rachael Rettner published

Ever since Gwyneth Paltrow endorsed vaginal steaming, doctors have warned that the practice isn't without risks.

Sex
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