sperm

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What Women Really Want— at Least in a Sperm Donor

Women tend to go for smart, shy, calm men when choosing biological dad

(Newser) - What women really want in a man could be vastly different depending on the scenario—i.e., lustful attraction at a bar versus calculated decision-making at a sperm bank. So a team of economists at Queensland University of Technology set out to examine sperm donor preferences among women online and... More »

Inside the Sperm 'Factory' That's Supplying the World

27K babies have been born with sperm from Cryos International

(Newser) - Ole Schou is the man in charge of "a kind of factory" where "volume and quality is important" and exports make up 96% of the business. But unlike most factories, his doesn't fabricate anything. At Cryos International, some 1,000 donors are paid $15 to $76 for... More »

At UK's National Sperm Bank, Choose Between 9 Donors

Choices are, um, limited

(Newser) - Fast-forward 18 years and it shouldn't be too hard for children born out of Britain's national sperm bank to identity their biological father. The year-old sperm bank, created to address a major sperm shortage in the UK, has just nine registered donors with the first samples set to... More »

What Marijuana May Do to Sperm

Nothing good...

(Newser) - Smoking pot could damage your semen quality, or so suggests a new study out of Denmark. Some 1,215 Danish men ages 18 to 28 were asked about their drug use over the past three months and provided a semen sample. The researchers found a correlation between men who smoked... More »

Man Sues After Ex Uses His Sperm to Get Pregnant

Layne Hardin says contract stated his sperm would go to another

(Newser) - Layne Hardin says his frozen sperm was always to go to Kathy LeBlanc. The pair had one child together, and in case they wanted a second, Hardin stored his sperm at a Houston fertility clinic in 2002, when the couple were domestic partners, before getting a vasectomy, reports ABC News... More »

Surprise Find in Antarctica: Oldest Animal Sperm

It dates back 50M years, from a worm

(Newser) - They were looking for mammal bones, but scientists exploring an island in the Antarctic instead stumbled across an unexpected milestone—the world's oldest animal sperm. They found it inside a fossilized cocoon made by some type of worm (possibly a crayfish worm) 50 million years ago, reports Nature . It... More »

Bioethicist: Men Should Freeze Sperm at 18

Paternal age having a serious effect on next generation, he says

(Newser) - When men are young and full of ... life, they should freeze some sperm for later use, a British bioethicist argues. Dr. Kevin Smith says the risks associated with older fathers—studies have pointed to higher rates of autism and a range of other mental disorders —are enough of a... More »

Could Pesticides Be Killing Our Sperm?

Fruits, veggies with higher pesticide residue resulted in fewer sperm: researchers

(Newser) - Occupational and environmental exposure to pesticides has already been linked to lower semen quality, according to a new study in the Human Reproduction journal. But scientists from the Harvard TH Chan School of Public Health were curious to conduct what they're calling the first study to examine how sperm... More »

How Tightie Whities Kill Sperm Counts

Laptops, cycling, saunas can also affect sperm for the same reason

(Newser) - Worried about how modern life affects human sperm, both in quantity and quality? You're not alone: Ideas have been circulating that things like underwear, laptops, cycling, and weight kill off or weaken sperm. So Five Thirty-Eight starts off by tackling the tight-underwear issue: A 2012 study looked at five... More »

Older Men Really Do Have Worse Sperm

Quality, volume goes down as men age, study says

(Newser) - Every sperm is sacred, but older ones need even more TLC than previously thought. Although scientists have long theorized that sperm quality drops as men age, a University of Otago review of 90 studies from more than 30 countries confirms there are "consistent age-related declines" in the quantity of... More »

Birth Control Shot for Guys May Be Here by 2017

Long-lasting Vasalgel contraceptive would require just a single injection

(Newser) - There may be another birth control option headed our way, and the guys will get to take the lead on this one. The Parsemus Foundation has tested an injectable, non-hormonal polymer contraceptive on male baboons that appears to successfully prevent pregnancy in females, Medical Daily reports. The procedure, which requires... More »

Macho Men Have So-So Sperm

Tradeoff between looks and virility might be at play, says study

(Newser) - Macho guys may attract more women, but the quality of their sperm might not be of he-man standards, a new study suggests. Oddly, the sperm of good-looking guys—but not necessarily macho ones with square jaws and distinct cheekbones—is just fine, reports Medical Daily . The link was found when... More »

'Robot Sperm' Slow but Accurate

Tiny robots could be used for IVF, researchers say

(Newser) - Technophobes may be alarmed to learn that new sperm-like robots could soon be performing many activities—including fertilizing human eggs. Researchers say the tiny bots, dubbed "MagnetoSperm," were inspired by the shape and movement of sperm cells and can "swim" to their target with incredible accuracy, LiveScience... More »

Scientists Find World's Oldest Sperm

Shrimp-like creatures were preserved nearly in mid-act 17M years ago

(Newser) - About 17 million years ago, a shrimp-like creature had sex in a cave in Australia, but instead of an afterglow, she got hit almost immediately with what one scientist thinks was a "torrential rain of bat droppings," reports Australia's ABC News . Her misfortune then is scientists' delight... More »

Discovered: Sperm's Docking Station

Protein allows sperm to link with egg

(Newser) - Scientists are announcing a breakthrough in the study of fertility. They've learned more about how a sperm cell links to an egg cell, offering hope for future treatments—for both fertility and contraception, Nature reports. Scientists already knew of a protein on the surface of a sperm cell that... More »

Palestinians Sneak Sperm Out of Israeli Prisons

Fertility doctor cooks up smuggling scheme

(Newser) - The wives of Palestinians held in Israeli prisons are getting pregnant in an odd way—by smuggling out the prisoners' sperm, NBC News reports. But the families won't say how they get the sperm past a glass separation, body search, and an airport-style scanner. "If I told you... More »

To Boost Sperm Count, Get Off the Couch

Exercise increases sperm count: new study

(Newser) - Want a higher sperm count? Get off the couch and start working out. A new Harvard University study found that college-aged men who often exercise have as much as 73% more sperm than their lazier peers, Bloomberg reports. Specifically, those who worked out more than 14 hours a week had... More »

French Sperm Quality Takes Huge Hit

Concentration of sperm in semen falls 32.3% over 16 years: study

(Newser) - The good news: The male population of France is still fertile. The bad: Its sperm isn't nearly what it once was. A 16-year study of 26,600 of the country's men found their sperm count has sharply fallen, with the number of millions of spermatozoa per milliliter down... More »

Smoking, Drinking Doesn't Hurt Your Sperm

Study suggests a lousy lifestyle won't hurt fertility chances

(Newser) - A study by British researchers seems to upend some standard medical advice for men: They found that smoking, heavy drinking, doing drugs, and being overweight doesn't affect sperm, reports the BBC . Researchers compared samples in about 2,000 men and found "little evidence" that lifestyle has any impact... More »

Demand for US Sperm on the Rise

Jumps as much as 40% in past 5 years, according to The Daily

(Newser) - From Chile to Sweden, people around the world want more and more of our ... sperm? That is indeed the case, according to the Daily , which reports that demand for American men's genetic material has climbed as much as 40% over the past five years. "In the last three... More »

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