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Articles on Reproduction

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Male orb-web spiders are dwarfed by their female counterparts, but they can maximise success if they don’t mate indiscriminately. Brian Gratwicke/Flickr

Tiny male spiders can get a leg over – as long as they’re picky

Males will mate with anything. Well, that is the general view, one that exists because of a simple biological underpinning: females are reproductively limited by costly gestation, while males are only…

Musky goat aroma fires up female brains

An aroma given off by male goats activates reproductive brain regions in their female counterparts. The study is the first…
We tend to think that only ovaries produce oestrogen. Hey Paul Studios

The brain also produces the sex hormone oestrogen

The female sex hormone oestrogen can be produced and released from the brain as well as the ovaries, according to a study. The research, recently published in the Journal of Neuroscience, shows that the…
After mating, all male Antechinus die … but why? badoo_tealeaf

Doing it to death: suicidal sex in ‘marsupial mice’

Imagine if you only had one shot at passing on your genes before you died. It happens more often in the natural world than you might expect: suicidal reproduction - where one or both sexes of a species…

Piercing genitals: good for species diversity

Two species of Tahitian plant insects, known for their traumatic insemination mating system, may be responsible for today’s…
Debate continues over how dinosaurs did the deed. Miroslav Petrasko (blog.hdrshooter.net)

Big bang theory: how did dinosaurs have sex?

Dinosaurs were the largest animals to ever walk Earth, and they ruled the planet for more than 160 million years. The long-necked Argentinosaurus, with back vertebrae almost two metres high, possibly grew…
Girl or boy? Mum has the final say. PA

Mammalian mums control the sex of their offspring

With the royal baby due soon, there is much speculation on whether the family will be welcoming a Prince or a Princess of Cambridge. But perhaps science can tell us the answer, as new research from Stanford…
New research suggests that seeds could now be formed without the biological process of fertilisation. CIMMYT

Seeds without sex – some racy findings on the cloning of plants

Sex without seed. Seed without sex. It’s been said that the greatest gift of science to humankind would be achieving those two goals. Effective contraceptives such as the pill have pretty much nailed the…
Researchers applied sunblock to the plumage of female blue tits to see how males reacted. Marko_K

Blue beauty: why male tits work harder for attractive partners

Rearing young is a costly business that often affects an individual’s own future survival or reproduction prospects. And so it makes sense for individuals to find ways to ensure the energy they spend on…
Humans and spider monkeys are the only primate species without a penis bone. Chris Makarsky

The human penis is a puzzler, no bones about it

The penis. It comes in so many different shapes and sizes … and that’s just in humans. As you would imagine, different species have very different penises. The males in most mammal species, including cats…
Researchers say women may be able to prolong their fertility in future by having an ovarian tissue transplant. bronx

Slowing the biological clock won’t solve family planning dilemmas

In future, women could remain fertile for longer by undergoing an ovarian tissue transplant, according to paper published this week by American and Danish researchers. The Reproductive Biomedicine paper…
Lilting voice? No need to look on the dark side. Bisgrafic

Did Darth Vader have a low sperm count?

Few individuals in the Star Wars universe inspired more fear than the Sith Lord, Darth Vader. But beneath the dark exterior, the commander-formerly-known-as-Anakin-Skywalker might have been hiding a dark…

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