HowStuffWorks explores the functions -- and dysfunctions -- of the reproductive system. Learn about maintaining a healthy sex life and avoiding and treating sexual problems.
What a Drop in Male Dog Fertility May Say About Human Male Fertility
Menstrual Cups Pose a Greater Risk for Toxic Shock Syndrome than Tampons
Want Just a Few Kids? Ask Mom to Move In
Exploring the Therapeutic Possibilities of Future Sexbots
A Controversial Female Libido Enhancer Is Reborn
This little pink pill is being marketed as a solution to low sex drive issues in women, but the reboot is generating a lot of backlash.
By Carrie Tatro Jun 22, 2018
A new study found that menstrual cups are greater breeding grounds for the bacteria that causes toxic shock syndrome than tampons.
By Alia Hoyt May 2, 2018
Mom or mother-in-law live with you and hubby? She might be interfering with your reproduction rate.
By Jamie Allen Nov 6, 2017
The Norwegian Broadcasting Corporation will air a show in fall 2017 featuring live sex, but it's for reasons you'd least likely expect.
By Alia Hoyt Aug 11, 2017
Using contrast dye dissolved in poppy-seed oil could be a cost-efficient alternative to treatments like IVF, new research confirms.
By Kate Kershner May 25, 2017
What could the future hold when man and machine meet? This piece of short fiction explores the science and the sensuality behind human existence.
By Robert Lamb Mar 30, 2017
Harvard researchers have developed a technology which may provide an inexpensive, easy way to test male fertility at home using a smartphone attachment.
By Jesslyn Shields Mar 23, 2017
Are we cuddling up to our smartphones instead?
By Dave Roos Mar 21, 2017
Some mammals mate and reproduce at a specific time of year, but not humans. (Spring break notwithstanding, of course.)
By Laurie L. Dove Mar 6, 2017
Rabies spreads by making hosts aggressive and more likely to bite. Wouldn't it make sense for a disease to up our arousal urge to get physical?
By Jesslyn Shields Feb 14, 2017
Vasectomies traditionally have been the only game in town when it comes to a long-acting form of male birth control. A new option may be on the horizon.
By Kate Kershner Feb 10, 2017
The headlines suggesting a link between depression and birth control might not be telling the whole story.
By Kathryn Whitbourne Oct 21, 2016
A new app relies on women taking their temperature each day and entering it into an app to determine fertility. Will this new approach to birth control catch on?
By Kate Kershner Oct 19, 2016
Menstrual cups still don’t get much love from many American women. Why's that?
By Kathryn Whitbourne Oct 5, 2016
In the next chapter of 'Men are from Mars, Women from Venus', a new study suggests that sex can extend the lives of older women, but shorten those of older men.
By Karen Kirkpatrick Sep 8, 2016
A study showed a decline in male dog fertility over 26 years, which researchers think may be due to chemicals in the environment.
By Alia Hoyt Aug 17, 2016
Humans are low-virginity, high-reproduction animals. Some of us go our whole lives with no action, either by choice or circumstance. How many people never have sex?
By Jesslyn Shields Aug 8, 2016
A new study found millennials are having less sex than Gen Xers did at the same age. But why?
By Yves Jeffcoat Aug 3, 2016
A new study finds that estrogen withdrawal due to plummeting hormone levels might make women with migraine more susceptible to an attack.
By Jesslyn Shields Jun 3, 2016
A new study has shown the amount of Americans who report a same-sex experience has doubled in the last 25 years.
By Christopher Hassiotis Jun 1, 2016
Only a tiny percentage of animals are socially and sexually monogamous, but that includes humans. A new study says ancient STDs may be at the root of the practice.
By Jesslyn Shields Apr 28, 2016
Say you're a female astronaut chosen for a three-year mission. That's 1,100 combined oral contraceptive pills you need to pack to stop your period. Is there a better way?
By Robert Lamb Apr 21, 2016
'Girls' creator was recently hospitalized with a ruptured ovarian cyst. What causes them?
By Nichole Bazemore Mar 16, 2016
Scientists say this zap to the penis is the first real alternative to the little blue pill in 15 years.
By Nichole Bazemore Mar 9, 2016
Study shows longevity is increased by castration.
By Dave Roos Oct 22, 2015
Switching Shampoos: Necessary or Nah?
The Missing States of the United States
Sometimes Babies Are Born With Teeth