Reproduction

Ducky day care

Why a Female Duck Was Spotted with a Huge Brood of 76 Ducklings

Think of it as ducky day care

For sperm, there's a vas deferens between start and finish, but the epididymis is what alters these swimmers en route.

Dads Pass On More Than Genetics in Their Sperm

Seminal research reveals that sperm change their cargo as they travel the reproductive tract—and the differences can have consequences for fertility

The science behind the uptick in cheetah births includes a new fecal hormone method to determine pregnancy in the animals.

Zoo Announces Another Seven Adorable Cheetah Cubs Are Born

With wild populations threatened, emerging and new techniques in the breeding science is growing ever more critical

Aggressive or sexual behavior in crows interacting with dead bodies might happen more often when sex hormones run rampant.

It's Not Without Caws That Crows Desecrate Their Dead

What dead crows can teach us about the connections between sex and aggression

Clay's team captured 15 female gnus for study. Following controlled exposure to male mating calls in an experimental setting, the quadrupeds (and their offspring) were released back into the wild.

How Noisy Males Control the Gnu’s Cycle

New research shows that ovulation in Serengeti wildebeests is accelerated and synchronized by the yammering of eager males

Graafian follicle, human ovary

How Artificial Ovaries Could Expand Fertility Options for Chemo Patients

Scientists have taken the next steps toward creating an alternative fertility preservation method using modified ovarian tissue

This scrotal male certainly isn't sheepish.

The Earliest Mammals Kept Their Cool With Descended Testicles

But if free-swinging sperm sacs are the norm, then why did undescended ones evolve four separate times?

Fossil ostracods on a slide from the collection of the Smithsonian’s National Museum of Natural History. The science team behind the recent Nature paper relied heavily on this collection for their analysis.

What the Large Penises of Tiny Crustaceans Tell Us About Evolution

Massive male sex organs have their perks, but in the long run, a little modesty pays

‘Our Bodies, Ourselves,’ the Revolutionary Feminist Health Book, Will No Longer Print New Editions

In the 1970s, the book promoted nonjudgemental discussions about women’s sexual and reproductive health

NASA Sends Human Sperm to the International Space Station

Astronauts will study how microgravity affects the motility of the little swimmers

The mother orca and her newborn calf.

A Male Orca and Its Mother Worked Together to Kill a Newborn Calf

It is the first time that infanticide has been observed among killer whales

Young pythons warm themselves

Study Reveals Pythons Take Care of Their Offspring, For a Little While

The southern African python wraps around its eggs to keep them warm and does the same for its snakelets during the first weeks of life

Will blue packets replace pink ones soon?

Heart-Stopping Arrow Poison Could Be the Key to Male Birth Control

A non-toxic version of the compound interrupts fertilization in rats

It's not as bad as it sounds.

Sorry, Guys: Your Y Chromosome May Be Doomed

But don’t worry, men aren’t going anywhere

Millions of Migrating Red Crabs Are Coming to Google Street View

The crustaceans are making their brief annual appearance on Australia's Christmas Island

Diploscapter pachys hasn't had sex for 18 million years, and is doing just fine

This Worm Hasn't Had Sex in 18 Million Years

By fusing its chromosomes, the creature could essentially clone itself while still maintaining genetic variation

Intracytoplasmic sperm injection (ICSI) is a more modern form of IVF.

In Vitro Fertilization Was Once As Controversial As Gene Editing is Today

The scientists who pioneered it were regarded as pariahs, even within their own universities

Fertility apps promise to help women both get pregnant and avoid pregnancy. But how reliable are they?

What’s Actually New About Today’s Newfangled Birth Control Apps?

These futuristic-sounding apps are on the rise, but it’s key to separate the data from the hype

Male wolf spiders may have eight eyes, but they still can't tell whether the female they're mating with is dead or alive.

Whoa: Polygamous Wolf Spiders Have a Natural Form of Birth Control

Females have figured out how to get rid of unwanted sperm, allowing them to reap the benefits of multiple mates

Natural Cycles App

Apps Can Help You Get Pregnant. But Should You Use Them as a Contraceptive?

An increasing number of women are relying on apps to track their menstrual cycles. Now, there's even an app approved as birth control.

Page 7 of 10