Reproduction

Leeuwenhoek's early microscopic observations of rabbit sperm (figs. 1-4) and dog sperm (figs. 5-8).

The Long, Winding Tale of Sperm Science

...and why it's finally headed in the right direction

Space mice snuggle with their Earth-bound mother.

Why Scientists Sent Mouse Sperm to the International Space Station

Back on Earth, a pile of new pups proves that mouse DNA can survive space

The 3D printed ovaries

Mice With 3D-Printed Ovaries Successfully Give Birth

The gelatin-scaffold ovary could one day help restore endocrine function in young cancer patients and treat infertility

Ovarian cells did their thing in a dish for researchers who used microfluidics and chips to recreate a female menstrual cycle.

Your Monthly Menstrual Cycle, Reenacted on a Microchip

Bodies are complicated, but they’re no match for persistent bioengineers

In times of desperation, female sawtooth sharks have been known to reproduce sans males. For other species, solo reproduction is downright vanilla.

Meet Eight Species That Are Bending the Rules of Reproduction

Spice up your mating life with relationship tips from rock lizards, sharks and water fleas

These are actually tadpoles.

Now You Can Measure Male Fertility With a Smartphone App

A new device helps men monitor their sperm count from the comfort of their own home

When it comes to reversible ways to prevent pregnancy, men have limited options—for now.

Contraceptive Gel Called the “IUD For Men” Makes It Through Monkey Trials

Vasalgel aims to make contraception for men as easy and effective as IUDs have for women

Scarce resources could push killer whales into menopause.

Orca Moms Might Go Into Menopause Because of Their Daughters

Competition could explain this evolutionary mystery

The better to infect you with, my dear...

For Viruses, the Best Way to Infect Baby Is Through Mama

Some viruses might take it easier on women—to get to their children

Postpartum depression inflicts one in seven mothers after their child's birth.

21st Century Cures Act Tackles Postpartum Depression

The new legislation includes grants to help diagnose and treat this prevalent issue

How does a bear catch a break around here?

Decades-Old Chemicals May Be Threatening Polar Bear Fertility, As If They Didn’t Have Enough to Worry About

A new study sheds light on how today's pollutants could become tomorrow's threats to wildlife and humans

The male brown widow spider may not be as unlucky in love as we once thought.

Male Widow Spiders Prefer Younger Ladies—So They Don’t Get Eaten

This strategy means they live to mate again, upending assumptions about these arachnids

A nesting male with a female in his nest.

Give it Up, Sneaky Males: These Lady Fish Have You Outwitted

Female ocellated wrasses have developed a surprising trick to control who fathers their offspring

Thanks, evolution.

The Evolutionary Reason Why Women Orgasm

New research suggests the female orgasm is tied to ovulation, not reproduction

You ain't seen nothing yet.

There’s No Wrong Way to Make a Tadpole (or Froglet)

Marsupial frogs, “vomit frogs” and foam-spewers reveal the glorious range of frog baby-making techniques

An adult tammar wallaby on Kangaroo Island, Australia.

Mother Wallabies Are Delaying Births Due to Bright Lights

Marsupials exposed to artificial light had their babies a month later than those that spent nights solely lit by the stars and moon

A New Pregnancy Test Can Predict Twins, Down Syndrome and More

A U.K. company is developing a urine test that analyzes patterns of proteins for information about the health of an expectant mother and her baby

Excess Embryos: Families Are Now Adopting Unused Embryos Leftover from IVF Treatments

The practice is relatively new and touches on complicated legal and ethical issues

Unsurprisingly, some giant tortoises take issue with humans trying to watch them breed.

Tortoise Defends His Lady in a Super Slow Chase

Here’s what happens when you interrupt two giant reptiles just trying to get in a bit of quality time together

An African cotton leafworm moth.

These Moths Remember Where They Mated for the First Time

The locale of the African cotton leafworm moth’s first experience pairing up forms its future preferences, a new study shows

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