reproduction

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We Barely Need Y Chromosomes
 Sorry, Men, We 
 Barely Need Y 
 Chromosomes 
study says
Nov 22, 2013 5:35 PM CST

Sorry, Men, We Barely Need Y Chromosomes

Just two genes from it are necessary to reproduce: study

(Newser) - Who needs a Y chromosome? Scientists have found that "male" mice without the sex-defining chromosome can reproduce—as long as they've got two key genes from it. A team in Hawaii worked with mice lacking full Y chromosomes; instead, they had two genes, called Sry and Eif2s3y, inserted...

French Sperm Quality Takes Huge Hit

 French Sperm Quality 
 Takes Huge Hit 
new study
Dec 5, 2012 7:20 AM CST

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...

Lab-Made Eggs Produce Healthy Mice

Points way to human infertility treatments

(Newser) - A year back, scientists in Japan produced healthy mice from lab-created sperm ; now, they've done the same with lab-made eggs. The project has big implications for humans, potentially paving the way for infertile men and women to have their own offspring. "This is quite a startling feat,"...

Egg Freezing: Mom, Dad&#39;s New Gift to Aging Daughters
Egg Freezing: Mom, Dad's New Gift to Aging Daughters
new trend
May 19, 2012 10:49 AM CDT

Egg Freezing: Mom, Dad's New Gift to Aging Daughters

More and more parents helping to foot the sizable bill

(Newser) - Some parents help pay for their kids' college tuition—others help foot the bill for freezing their daughters eggs? Apparently. The New York Times reports on what it paints as a growing trend: Would-be grandparents, worried about their daughter's advancing age and aware of the fact that the procedure...

Having Sex Confers Evolutionary Benefits: Study
 Save 
 Humanity: 
 Have Sex 
study says
Jul 8, 2011 2:25 PM CDT

Save Humanity: Have Sex

Sexual reproduction confers evolutionary benefits

(Newser) - Scientists have long theorized that sexual reproduction was better, evolutionarily speaking, than its asexual counterpart—and now they’ve got some evidence. Researchers in Britain found that sexually-reproducing worms were better at staying “one evolutionary step ahead” of parasites than asexual versions of the same worm, NPR reports. That...

The Celeb With the Most Baby Mamas Is...

Take your pick: Bob Marley, Clint Eastwood, Jack Nicholson all qualify

(Newser) - Times change but one thing remains constant—successful men find success with the ladies. But success at birth control? Not so much. So the Daily Beast put together an overview of some of the most notable celebrity super-spawners. Here's a list of the father(s) of all baby mamas:
  • Jack Nicholson,
...

Radiation Threatens Deep-Space Sex: NASA

Protons could kill embryo's eggs, cut sperm count

(Newser) - Propagating the human race far away from home could be tough: Powerful radiation in space would likely sterilize female embryos conceived there, NASA finds, and it could shrink sperm counts, too. At the moment, we don’t have the technology required to create spacecraft shielding to block the radiation, the...

Childlessness Soars to 18%
 Childlessness Soars to 18%  
Jun 25, 2010 5:30 AM CDT

Childlessness Soars to 18%

Social pressure to have children has eased, study finds

(Newser) - The percentage of American women who enter their 40s having never had a child has almost doubled since the 1970s to 18%, according to a Pew Research Center analysis of census data. White women are more likely than ethnic minorities to remain childless, though the gap is rapidly narrowing, the...

Docs: 'No One Will Need Sex to Make Babies in 10 Years'

Veterinary surgeons predict IVF will replace 'fairly inefficient' intercourse

(Newser) - Sex will become purely recreational even for couples seeking babies within a decade thanks to advances in IVF technology, predict veterinary Australian scientists. Calling the traditional form of baby-making a "fairly inefficient process" in a report published in the Reproductive BioMedicine journal, they claim in vitro fertilization methods will...

Higher SATs Mean More Cash for Egg Donors

Some worry about commodification as prices approach $35K

(Newser) - Smarter women—or at least those who test well—get paid more to donate eggs. "Holding all else equal, an increase of 100 SAT points in the score of a typical incoming student increased the compensation offered to oocyte donors at that college or university by $2,350,"...

Professional Group Expels Octomom Doc

Reproductive medicine society says Kamrava was out of line

(Newser) - Michael Kamrava, the fertility doctor who twice implanted six embryos into octomom Nadya Suleman (two embryos reportedly split into twins), has been kicked out of the American Society for Reproductive Medicine. The society recommends no more than two embryos for women under 35, to reduce the risk of multiple births;...

'Sex Mints'? No, Thanks!
 'Sex Mints'? No, Thanks! 
consumer alert
Oct 12, 2009 5:10 PM CDT

'Sex Mints'? No, Thanks!

'Internal feminine flavoring' not quite what this blogger had in mind

(Newser) - The press release was so intriguing that Jen Phillips had to know more. Linger mints are being promoted as "internal feminine flavoring"—you read that right—with the catchall please-don't-sue-us warning that they're "for novelty use only." And no wonder: They're mostly sugar, which is...

Who Needs Males? Not Self-Cloning Tropical Ants

(Newser) - Are men really necessary? Not if you’re a Mycoceperus smithii ant. Researchers have discovered that the tropical ant species is comprised entirely of females, the BBC reports. A colony’s queen will clone itself, producing only daughters. Though such sex-free reproduction is common in the ant world, this is...

Do Cougars Really Spawn a Brighter Brood?
Do Cougars Really Spawn
a Brighter Brood?
GLOSSIES
Mar 16, 2009 11:22 AM CDT

Do Cougars Really Spawn a Brighter Brood?

(Newser) - "At last, science has produced the case for cougars," writes Emily Nussbaum in New York. A study analyzing more than 50,000 pregnant women found that older fathers produce progeny that score lower on concentration, memory, and learning tests. Older mothers, on the other hand, are associated with...

Frank Female Writers Put New Spin on 'Period Piece'

Have a gross-out story? Turns out America wants to hear it

(Newser) - Warning: Reading this may cause queasiness and catharsis. Women are firing up their best (or worst) lodged-tampons stories, yeast-infection remedies, and bloody-period sex tales for America’s commiserating pleasure. “Oversharing is in,” Rebecca Traister declares in Salon. “It’s not so much ‘too much information’ as...

Long-Living Whales Shed Light on Menopause

Females see offspring through to maturity

(Newser) - Stumped scientists finally have a clue about the evolutionary purpose of post-menopausal women. Female killer whales—who outlive males by decades—stick around to nurture their kin through maturity, the Los Angeles Times reports. Similarly, human mamas may stick around to ensure their kids really, truly, don't need them anymore....

'Benjamin Button' Jellyfish Are Immortal

Can revert to younger form and reproduce

(Newser) - For some aging jellyfish, their best years may still be ahead: Faced with a threat, one species can essentially turn itself younger again, National Geographic reports. Turritopsis dohrnii reverts its cells to a “younger state,” says a researcher, and becomes a blob; from there, it develops into a...

Egg-Freezing a Risky Way to Go
Egg-Freezing a Risky Way to Go
Feb 1, 2009 4:35 PM CST

Egg-Freezing a Risky Way to Go

Low success rate makes it a 'gamble' for women wanting to delay motherhood

(Newser) - British doctors are warning women in their 20s and 30s against freezing their eggs to have children later in life, the Telegraph reports. "The central issue is that it doesn't work very well," one doctor said. "The chance of a baby from a frozen egg with...

Baby Born in UK Screened To Be Cancer-Free

Scientists implanted in womb only cells without genes that could lead to disease

(Newser) - The UK’s first “cancer-free” baby was born yesterday, but not without a shower of criticism for the parents and doctors, the BBC reports. Doctors screened the embryo for the altered BRCA1 gene, whose carriers have an 80% chance of developing breast cancer. “The parents will have been...

In Vitro Linked to Birth Defects

Study finds higher rate of certain defects among babies born with help of technology

(Newser) - Babies conceived with the help of medical technology are much more likely to suffer from several serious birth defects, a new study finds. Infants whose mothers used in vitro fertilization or intra-cytoplasmic sperm injection were around twice as likely to have heart defects or cleft palates and four times as...

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