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Evolutionary puzzle: Why do fraternal twins exist?

The chances of having fraternal twins changes with maternal age and is heritable ...
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Birth rates expected to crash by half in coming decades in some countries, driven by educated, working women

Falling fertility rates mean nearly every country could have shrinking populations by the end of the century. And 23 nations - ...
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Social and health complications in children linked to aging parents. Should age restrictions on fertility treatments be raised?

For nearly 40 years, fertility treatment has grown ever more advanced and so entrenched that it’s not uncommon for couples ...
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Marijuana? Masturbation? Alcohol? What behaviors affect male fertility?

[W]e can look at overall trends in the scientific literature and draw some conclusions about what facets of your life ...
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Is IVF an essential medical procedure during a pandemic?

The pandemic confronts patients and health-care providers with new ethical dilemmas. Is it too risky to pursue a fertility procedure ...
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Fertility breakthrough: First baby born from eggs matured in lab before being frozen

Fertility doctors in France have announced the birth of the first baby to be born to a cancer patient from ...
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US birth rate hits record low—and that might be a good thing

The U.S. total fertility rate has dropped to below 1.73 births per woman, according to a new report from the ...
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This can ‘never ever’ happen again: Cleveland fertility clinic sued over 4,000 lost eggs

Almost two years ago, a freezer malfunction at an Ohio fertility clinic may have destroyed hundreds of patients' chances at ...
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How fertile are you? ‘Ovarian reserve’ DTC tests that count your eggs offer mixture of control and misinformation

Joining the reproductive fray are tests designed to assess fertility by counting the number of eggs left in a woman's ...
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Video: In 40 years, babies could be made in the lab from skin cells

The "birds and the bees" as we know them are changing. A new process called in vitro gametogenesis (IVG) is ...
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Another benefit of regular exercise— ‘agile, fast-moving sperm’

Regular physical activity can keep a man’s sperm in tip-top shape, a new study suggests. The research was published [December 20] in ...
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Computer simulation suggests we aren’t even close to designing better babies

It’s difficult to talk about genetic selection without the umbrella of morality or ethics. Yet like all scientific advancements, it ...
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Controversial ‘3-parent baby’ technique not effective for women over 36, fertility doctors warn

An experimental and much-hyped reproductive procedure that mixes DNA from three people is not effective at boosting the chances of ...
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IVF nightmare: Fertility clinic glitch results in babies being born to wrong parents

Anni and Ashot Manukyan wanted their daughter to have a younger sibling, so they used a fertility clinic to try ...
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Do these ‘natural’ birth control methods work? Don’t count on it.

I asked some real experts—Robin Watkins, a women’s-health nurse practitioner and director of health care at Power to Decide, and ...
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Sperm counts are falling. Here are 5 ways to boost male fertility

The concentration of sperm in semen, also known as sperm count, has halved in the West since the 1970s. The ...
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Viewpoint: ‘Greed and profit’ will drive human gene editing unless we develop strong regulations

We may now be on the verge of adding germline engineering to the menu of available reproductive services, that will, ...
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Boutique startups give fertility treatments a ‘luxury’ makeover

[There’s a] growing world of boutique egg-freezing operations Instagrammable enough for their majority-millennial clientele. Take Trellis, a “women’s fertility studio,” ...
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‘Testes in overdrive’: Male efforts to improve attractiveness can damage ability to have children

Scientists have uncovered an evolutionary paradox where men damage their ability to have children during efforts to make themselves look ...
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Should you freeze your sperm? The biological clock is ticking for men, too

Women face the brunt of societal pressure to have children before a certain age, but a new study concludes that ...
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Women are freezing their eggs for use later. Will they be viable when thawed?

Because eggs are one of the most important factors in female fertility, and both their quality and quantity declines with ...
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‘An insurance policy for the future’: Why some healthy young men are freezing their sperm

Gilbert Sanchez froze his sperm in January [2019], shortly before his 25th birthday. He was healthy and at low-risk for ...
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Could we be designing babies from a menu of genetic options in 2045?

The year is 2045. The genomes of four billion humans have been sequenced, creating a huge pool of genetic information ...
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Making the case for lifting the US ban on 3-parent babies

A Greek woman with a history of multiple in vitro fertilization failures gave birth to a healthy baby with DNA ...
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US researcher: ‘3-parent’ embryos ready to implant if Congress lifts ban on controversial treatment

Researchers at Columbia University in New York have created embryos containing genetic material from three people and are ready to ...
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3-parent baby sparks backlash after doctors use experimental procedure as a fertility treatment

A baby with DNA from three people has been born in Greece following a controversial fertility treatment. The baby boy, weighing 2.9kg ...
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Technological ‘leap forward’ moves artificial wombs closer to reality

In 2017, a team of Australian and Japanese scientists announced a breakthrough that could someday save the lives of countless babies. They ...
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Can artificial intelligence improve IVF success rates?

In theory, an AI application would be able to pick out the single best embryo to use for IVF to ...