in mind. And the team behind it hopes that one day they'll restore fertility and hormone

Human males can retain their fertility for their whole lives, which would suggest that whatever evolutionary pressures led to grandmothering, didn't apply to grandfathering.

But those other animals do undergo reproductive senescence, or a decline in fertility with aging.

which included spanking women with goatskin to promote fertility in the coming year.

to promote fertility in the coming year.

In 2020, China's fertility rate⏤or the number of children a woman has over her lifetime⏤came in at 1.3, which is one of the lowest in the world.

Despite reversing the one-child policy in 2016, China's fertility rate has continued to decline.

already pointing to declining fertility rates.

They tell you, once you take a cup of this tea every morning for say one month you're going to lose weight. And there's also things like herbal cure-it-alls, you know, lots of mixtures of herbs which they claim, oh this can cure HIV, this can cure cancer, this can cure sickle cell anemia. And there are lots of messages from health experts, even state regulatory bodies, saying, oh these things do not work. We do not have any evidence that these things will offer you the value that this will promise, that it offers. And then there are also things like unregulated fertility and aphrodisiac products. You know, people and lots of messages online will tell you, oh once you take this or you apply this topically, you're going to get better in the other room. You know, you're going to be better, your performance is going to be great, it's going to offer you this and that. Part of the reasons why this happens in a country like Nigeria is currently, Nigeria is facing very tough economic times and this has affected the cost of drugs. Most people can no longer afford medical products, so they are turning to alternative means, unorthodox means, and they're looking for ways to take care of their health while they can still, you know, keep the little money that they have. Then things like the cultural background of Nigeria and the religious background, Nigeria being a very conservative country, conversations around sex and fertility and reproductive health isn't what you ideally hear people talk about in the open. So that means, because it's very hush-hush, people seek for very secret ways to address their needs in that sphere. And lastly, here is our What in the World colleague, Maria Clara Montoya.

But China has had a fertility rate

but combined with sustained low fertility...

their burrows. And by doing so, they increase the fertility of the soil and make that material

So it seems even though earthworms have a positive effect on soil fertility, which is

starts to decrease in our 30s, female fertility sharply declines after 35, age-related near-sightedness

is why now male fertility issues contribute 1/4 to 1/3

of all fertility issues.