Artikel-artikel mengenai Sexual reproduction

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Euphanerops, a primitive jawless fish from the World Heritage site at Miguasha, Quebec, which has now been found to have paired hind limb structures and copulatory sex organs. François Miville-Deschênes with permission

The origins of those sexual organs: a fishy tale much more primitive than we thought

Sexual organs similar to what we see in sharks and rays today appeared many millions of years ago in much more primitive ancient fishes than was previously thought.
Gird your loins. Shutterstock

Are plastics making men infertile?

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.
A bull male Eastmanosteus placoderm. Placoderms were the first creatures to evolve paired reproductive organs with a bony skeleton called claspers. Brian Choo & John Long, Flinders University.

The first vertebrate sexual organs evolved as an extra pair of legs

We humans use the euphemism for sex that “we like to get a leg over” but the first jawed vertebrates – the placoderms – they liked to get a leg in. They were the first back-boned creatures to evolve male…
Trypanosomes in the blood. Wendy Gibson

Caught in the act: microbes do have sex

There is no denying that humans think sex is important, but it also matters for microbes. Sex allows genes from two parents to be mixed, leading to new combinations of genes in the offspring. In the past…

Scientists shut down insects sex drive

A neuropeptide that regulates sexual activity and reproduction in insects has been identified by a team of entomologists…
Only a handful of mammals aside from us – primates, some bat species and the elephant shrew – get their period. Image from shutterstock.com

Explainer: why do women menstruate?

For half the population, it comes three to five days each month, 12 months each year, for 40 years of our lives. Menstruation can be debilitating, relieving, disappointing, or simply an inconvenient fact…
We no longer have to take the view that women’s biology, including their hormone profiles, are unimportant. Susan/Flickr

PMS is real and denying its existence harms women

A recent opinion piece in the Fairfax papers – based on a Conversation article – discussed “the theory that (PMS) is all in women’s minds as opposed to their endocrinology …” Why is this debate from the…
A female zebra finch finds herself surrounded by male suitors - but who to listen to? Simon Griffith

Birds and boasting: honest when mating, dishonest when dating

A new study has revealed what many people possibly already suspect – males are more honest when displaying their “quality” to a partner than to an unfamiliar female. These findings, from a study of a socially…
If you’re a female guppy it pays to take many mates … sort of. André "Drekas" Correia/Flickr

More sex partners means more grandkids … if you’re a guppy

Here’s some good news: having more sexual partners makes females more fertile. A recent study on Trinidadian guppies has shown that females who mate with multiple males produce more grand-offspring than…

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