Reproduction

One of the adult ospreys in the breeding pair

Ospreys Breed in Ireland for the First Time in More Than 200 Years

The birds were driven to local extinction in the 18th century, but the new chicks provide hope for a comeback amid reintroduction efforts

Vasectomies should allow male peacocks to maintain their established pecking order while also preventing them from reproducing with multiple females.

Can Peacock Vasectomies Save This Florida Town?

Residents of Pinecrest don't want to kill the colorful birds, but they do want to keep their growing population in check

A plate from the Birth Atlas, the Maternity Center Association's manual depicting the entire Birth
Series using photography and line plate drawing

At the 1939 World’s Fair, Robert Latou Dickinson Demystified Pregnancy for a Curious Public

The gynecologist and sculptor’s “Birth Series” broke barriers, but how do his views on abortion, race and women’s health square with what we know today?

A magpie nest in Antwerp, Belgium, made with anti-bird spikes

Crows and Magpies Snatch Anti-Bird Spikes to Build Their Nests

Birds in Europe are prying up the metal barbs, meant to repel them from roosting on buildings, and using the devices as nesting material

Opill was first approved by the FDA about 50 years ago, but until now, users needed a prescription to access it.

FDA Approves First Over-the-Counter Birth Control Pill

Experts say the decision will increase access to safe and effective contraceptives for millions of Americans

Brooding octopuses at a previously unexplored site in the Pacific Ocean, off the western coast of Costa Rica

Scientists Find Rare Deep-Sea Octopus Nurseries

The team captured footage of the eight-armed creatures brooding their eggs in groups near Costa Rica

An illustration of Anthony Comstock, published in Puck magazine in 1906

The 150-Year-Old Comstock Act Could Transform the Abortion Debate

Once considered a relic of moral panics past, the 1873 law criminalized sending "obscene, lewd or lascivious" materials through the mail

Researchers hope that an injection could one day be a faster and safer substitute for surgical cat sterilization.

Scientists Develop New Birth Control for Female Cats—No Surgery Necessary

The one-time injection of a gene therapy could eventually be used to control cat populations

American crocodiles haven't been known to reproduce via parthenogenesis—until now.

Scientists Record the First 'Virgin Birth' in a Crocodile

A female American crocodile living in captivity reproduced without a mate—a finding that suggests dinosaurs might have done the same thing

After eight months of hibernation, Arctic ground squirrels emerge in the spring hungry and ready to mate.

Climate Change Is a Wake-Up Call for Hibernating Squirrels

As spring arrives sooner, female Arctic ground squirrels are emerging from their burrows earlier, according to a new study

An image of stem cells on a computer screen from 2010. Stem cells have the potential to develop into various types of cells.

Scientists Create 'Synthetic Embryos' From Monkey Cells

By studying lab-grown stem cells, scientists hope to shed light on miscarriages and birth defects

Yellow crazy ants (Anoplolepis gracilipes)

These Male Ants Have Two Separate Sets of DNA

A genetic condition called chimerism may have helped yellow crazy ants become a dominating invasive species, a new study suggests

Lab-raised cockroaches adapted to maintain their glucose-focused sex lives while still avoiding sugary baited traps set by humans.

Cockroach Sex Is Evolving in Response to Pesticides

A new study highlights the insects' resiliency in spite of human attempts to kill them

Dill, Jalapeño and Gherkin, the three newly hatched radiated tortoises at the Houston Zoo.

90-Year-Old Tortoise Fathers His First Offspring at Houston Zoo

Critically endangered radiated tortoises don’t reproduce often, so this is a win for the species

A male (silver) and female (brown) common European adder meet prior to mating. Scientists are just beginning to understand female sexual anatomy in snakes.

Why Did Scientists Wait So Long to Study the Snake Clitoris?

The delay is representative of a major problem in biology: Female and intersex animals are understudied compared with their male counterparts

Many animals like corals release eggs and sperm into the water on just the right nights of the month.

How Lunar Cycles Guide the Spawning of Sea Creatures

Researchers are starting to understand the biological rhythms that sync worms and corals to phases of the moon

An illustration of Tillyardembia, an earwig-like insect that may have pollinated non-flowering plants some 280 million years ago.

Scientists Discover Oldest Known Fossils of Pollen-Carrying Insects

It’s unclear whether the creatures were pollinating prehistoric plants or just getting a snack

The experimental treatment inhibits an enzyme that is needed for sperm to move.

Male Birth Control Drug 'Stops Sperm in Their Tracks' in Study of Mice

The drug served as a quick-acting, temporary contraceptive with no noticeable side effects, researchers say

Northern quolls are the smallest of Australia's four quoll species.

Too Much Sex and Too Little Sleep Can Kill These Endangered Marsupials

A study finds male northern quolls forgo rest to travel up to 6.5 miles in one night in search of a mate—the equivalent of a human walking 25 miles

Five images display (A) an unhatched egg, (B) a circular outline of a possibly unhatched egg, (C) a compressed egg showing hatching window (arrow) and eggshells collected around the hatching window (circled), (D) an egg showing a curved outline, and (E) a deformed egg showing egg surfaces slipping past each other.

Scientists Uncover Nearly 100 Dinosaur Nests in Fossilized Hatchery

The find reveals that plant-eating titanosaurs had reproductive similarities to both birds and crocodiles

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