Women’s Cervical Mucus Prefers Some Sperm Over Others 
Women’s Cervical Mucus Prefers Some Sperm Over Others 
In human male-female pairs with a less similar suite of genes for human leukocyte antigens, sperm fare better when exposed to cervical mucus.
Women’s Cervical Mucus Prefers Some Sperm Over Others 
Women’s Cervical Mucus Prefers Some Sperm Over Others 

In human male-female pairs with a less similar suite of genes for human leukocyte antigens, sperm fare better when exposed to cervical mucus.

In human male-female pairs with a less similar suite of genes for human leukocyte antigens, sperm fare better when exposed to cervical mucus.

sexual reproduction
Image of the Day: Spider Sex
Image of the Day: Spider Sex
Nicoletta Lanese | Aug 26, 2019
Funnel-web spiders change the timing of their distinct courtship behavior depending on what microbes they’re carrying.
Image of the Day: Self-Insemination
Image of the Day: Self-Insemination
Carolyn Wilke | Feb 1, 2019
Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.
Male Fruit Flies Take Pleasure in Having Sex
Male Fruit Flies Take Pleasure in Having Sex
Jim Daley | Apr 20, 2018
Sex-deprived males seek out alcohol.
Why Paternal Mitochondria Aren’t Passed On to Offspring
Why Paternal Mitochondria Aren’t Passed On to Offspring
Tanya Lewis | Jun 24, 2016
Researchers identify a C. elegans gene that leads the organelles to self-destruct in sperm following fertilization of an egg.
Review: <em>The End of Sex</em>
Review: The End of Sex
Tanya Lewis | May 13, 2016
Legal expert Henry Greely envisions a world in which advances in biotechnology obviate the need for sexual reproduction as we know it.
Laugh, Then Think: The Ig Nobels
Laugh, Then Think: The Ig Nobels
Karen Zusi | Sep 21, 2015
This year’s awards honor research on bee stings, appendicitis, kissing, and more.
Fending Off Infection in Future Generations
Fending Off Infection in Future Generations
Jef Akst | Aug 17, 2015
Female fruit flies challenged with infection during their lifetimes have offspring with greater genetic diversity.
How to Make a New Species
How to Make a New Species
Ruth Williams | Jul 1, 2015
Scientists mutate a mating pheromone and its corresponding receptor in yeast to promote speciation.
Drug for Low Sex Drive in Women?
Drug for Low Sex Drive in Women?
Jef Akst | Jun 8, 2015
A federal advisory panel supports the US Food and Drug Administration’s approval of the first drug for female sexual dysfunction.
Unique Frog Breeding
Unique Frog Breeding
Bob Grant | Jan 5, 2015
A newly described amphibian species engages in internal fertilizations and gives birth to tadpoles.
A Tale of Two Genitals
A Tale of Two Genitals
Bob Grant | Nov 5, 2014
The genitalia of mammals and reptiles develop from two different tissues, but the structures share common genetic programs and molecular induction signals.
Week in Review: June 30–July 4
Week in Review: June 30–July 4
Tracy Vence | Jul 3, 2014
STAP retractions; comparing SCNT-derived stem cells with iPSCs; malaria-infected mice more attractive to mosquitoes; stem cell banks face business challenges
Semen Says
Semen Says
Rina Shaikh-Lesko | Jul 1, 2014
Scientists report for the first time that a snail’s seminal fluid proteins can suppress the mating success of the male side of its hermaphroditic partner.
That Loving Feeling
That Loving Feeling
Megan Scudellari | Jul 1, 2014
There are no FDA-approved drugs to treat low sexual desire in women, but not for lack of trying.
Capsule Reviews
Capsule Reviews
Bob Grant | Jul 1, 2014
Sex on Earth, Wild Connection, The Classification of Sex, and XL Love
Speaking of Sex
Speaking of Sex
The Scientist Staff | Jul 1, 2014
July 2014's selection of notable quotes
Carnal Knowledge
Carnal Knowledge
Bob Grant | Jul 1, 2014
Sex is an inherently fascinating aspect of life. As researchers learn more and more about it, surprises regularly emerge.
The Hidden Side of Sex
The Hidden Side of Sex
Patricia L.R. Brennan | Jul 1, 2014
Sexual selection doesn’t end when females choose a mate. Females and males of many animal species employ an array of tactics to stack the deck in their reproductive favor.
Doodoo Rendezvous
Doodoo Rendezvous
Bob Grant | Jun 30, 2014
Watch flightless dung beetles (Circellium bacchus), sneaky copulators and crap connoisseurs, do their thing in South Africa.