Funnel-web spiders change the timing of their distinct courtship behavior depending on what microbes they’re carrying.

Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.

Sex-deprived males seek out alcohol.

Researchers identify a C. elegans gene that leads the organelles to self-destruct in sperm following fertilization of an egg.

Legal expert Henry Greely envisions a world in which advances in biotechnology obviate the need for sexual reproduction as we know it.

This year’s awards honor research on bee stings, appendicitis, kissing, and more.

Female fruit flies challenged with infection during their lifetimes have offspring with greater genetic diversity.

Scientists mutate a mating pheromone and its corresponding receptor in yeast to promote speciation.

A federal advisory panel supports the US Food and Drug Administration’s approval of the first drug for female sexual dysfunction.

A newly described amphibian species engages in internal fertilizations and gives birth to tadpoles.

The genitalia of mammals and reptiles develop from two different tissues, but the structures share common genetic programs and molecular induction signals.

STAP retractions; comparing SCNT-derived stem cells with iPSCs; malaria-infected mice more attractive to mosquitoes; stem cell banks face business challenges

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.

There are no FDA-approved drugs to treat low sexual desire in women, but not for lack of trying.

Sex on Earth, Wild Connection, The Classification of Sex, and XL Love

July 2014's selection of notable quotes

Sex is an inherently fascinating aspect of life. As researchers learn more and more about it, surprises regularly emerge.

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.

Watch flightless dung beetles (Circellium bacchus), sneaky copulators and crap connoisseurs, do their thing in South Africa.