Reproduction

A non-hormonal, reversible and safe male pill may be in sight, as scientists successfully silence a protein crucial in fertile sperm production. Knocking out this protein temporarily resulted in unviable sperm, without any lasting impacts on fertility.

Lab-grown testicle organoids that closely resemble the real thing provide a promising model for research that may help our understanding of testicular development and translate into therapeutic applications for male infertility.

Scientists have boosted the motility of slow sperm by blasting the cells with 40-MHz ultrasound waves to induce movement. Capturing the technique's impact on individual sperm cells, the study opens the door to new non-invasive fertility treatments.

Declining fertility can make it harder to have kids in middle age. Now scientists have identified a mechanism that seems to accelerate aging of the ovaries – and found a way, in mice at least, to slow it down to boost fertility later in life.

A new study has linked preconception exposure to phthalates to reduced odds of getting pregnant, adding to a growing body of evidence about the negative effects of these chemicals, commonly found in personal care products like soap and shampoo.

A study has found that plastic additives might be stopping the reproductive habits of a shrimp-like species that is key to the marine food chain. The findings provide a different perspective on the potential damage caused by specific pollutants.

What has eyes, antennae, swimming bristles, a genes stash and a feel for autonomy? The rear end of the bizarre Japanese green syllid worm. Scientists now know how the end of the animal detaches and swims off to find a similar tail of the opposite sex.

Genitalia in the animal kingdom is rarely dull, from penis 'sword' fighting flatworms, to echidnas with four-headed phalluses. Let us introduce a new odd member contender: a beetle with an appendage that looks like you could crack open a beer with it.

A study of nearly 3,000 Swiss men over the course of 13 years has shown a link between frequent cell phone use and a decrease in sperm quantity. What's more, today's 4G and 5G networks may have less of an impact than older communications technology.

In one small step for humankind, scientists have seen a fertilized mouse egg develop naturally and normally into early embryonic form. While a long way to go, it’s a positive sign that mammalian – namely, human – reproduction can take place in space.

During the European frog's 'explosive breeding' sessions, it's not uncommon to see multiple males pile on a single female. Now, they're fighting back, performing some Oscar-worthy acting to convince their pushy mates that the coupling is a dead end.

Believe it or not, male sexual desire actually begins in the brain. Scientists have found the neural circuit that triggers mating behaviors and the ensuing pleasure and reward feedback in mice. They hope it can lead to new drugs to treat dysfunction.