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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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‘It changed the world’: Exploring 60 years with the birth control pill

Loretta Ross, an activist and visiting women's studies professor at Smith College, was among the first generation of young women ...
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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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Controversial CRISPR-edited sperm experiment seeks to reduce risk for breast, ovarian, prostate cancers

Reproductive biologists at Weill Cornell Medicine in New York City are attempting to use the powerful gene-editing technique called CRISPR ...
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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, ...