Sexual competition has made sperm the most diverse - and fascinating - cells in the animal kingdom.
Both biology and culture likely contribute to our reproductive behaviour.
Is a woman's longing for a child evolution at work, or social conditioning? And what about those who don't want kids? Are they defying nature? Probably not, as almost everyone wants sex.
Many animals form life-long partnerships, but they’re not always about sex.
Many animals, including humans, form long-term partnerships, but some are same-sex, suggesting they're not all about raising offspring but some other form of cooperation.
Fly me to the moon.
Scientists have tended to think of nonhuman sexual behaviour as being all about reproduction. In fact, there is far more ha ha hee hee than we give animals credit for.
What the world is waiting for?
Since science made it possible to research manipulating the cells that are linked to reproduction, the naysayers have carried the day. But how solid are their objections really?
Sometimes the audience can be a font of illuminating questions.
I sometimes forget that people can feel embarrassed listening to me talk about my research on sperm. But often those same people can also be a source of amazement and inspiration.
Gird your loins.
Recent research into the health effects of the plastic-making chemicals phthalates has reignited concerns about low sperm counts. But the evidence is far from conclusive.
Told you so!
Photo of Charles Darwin uploaded by Shehal Joseph/Flickr
Sperm banks and human cloning may not be the future. A study in beetles reveals that having two sexes boosts genetic quality.
India’s sterilisation programme focuses on women.
A sterilisation camp held in Chhattisgarh, an impoverished state in central India, has claimed the lives of 13 women, most of whom were young and marginalised. The women, who died within hours of the procedure…
I’ll have a clean cage with a side of fertility issues.
Mouse image via www.shutterstock.com
Mice possess a notable talent: they are excellent at making more mice. Their ability to reproduce at a breakneck pace is one reason they are often used as experimental research subjects. Thus, when Dr…
Honeybee reproductive cycles begin when the colony grows to a certain size. Cornell University researchers found honeybee…
Three person IVF will prevent mitochondrial disease.
The UK parliament will soon consider making Britain the first country to allow three-person IVF. The regulations are yet to be approved, but the government is currently backing moves to allow the creation…
Light pollution disrupts the natural reproductive cycle of lemurs a new study has found. Male lemurs are sexually inactive…
Sperm grown from the frozen testicle tissue of newborn mice has been used to produce healthy offspring, according to a new…
Males produce faster sperm when mated to their sisters, according to a recent study of guppies. Researchers from the University…
Male orb-web spiders are dwarfed by their female counterparts, but they can maximise success if they don’t mate indiscriminately.
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…
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 female sex hormone oestrogen can be produced and released from the brain as well as the ovaries, according to a study…
After mating, all male
Antechinus die … but why?
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…
Two species of Tahitian plant insects, known for their traumatic insemination mating system, may be responsible for today’s…