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Morning-After Pill May Be Less Effective for Heavier Women

Some morning-after pills may not be a reliable way to prevent pregnancy in heavier women. The European manufacturer of an emergency contraceptive pill, Norlevo, will caution women in new labeling that the product is “not effective” for women over 176 pounds and doesn’t work as well in women who weigh 165 pounds or more.

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Are Vince Vaughn’s 533 Children In ‘Delivery Man’ Possible? We Asked Science

By now, if you own a television and watch it occasionally, you’ve seen the promos for Friday’s “Delivery Man,” wherein a “lawyer from a sperm bank” breaks the news to Vince Vaughn’s protagonist character that due to some sort of clerical error, he is the biological father of 533 children out in the world.

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Why Is There Still No Male Contraceptive Pill?

In the last six decades we’ve invented mobile phones, the internet and microwaves. And yet the contraceptive pill for women is still seen as the default option for sexually active couples. Vicky Spratt talks to a medical doctor-turned professor working on the development of the male pill, and asks whether this will ever become a reality.

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Signs of Aging, Even in the Embryo

In 1961, two biologists named Leonard Hayflick and Paul Moorehead discovered that old age is built into our cells. At the time, many scientists believed that if healthy human cells were put in a flask with a steady supply of nutrients, they would multiply forever. But when Dr. Hayflick and Dr. Moorehead reared fetal human cells, that’s not what they found. Time and again, their cells would divide about 50 times and then simply stop.