Data you can't ignore: You're more likely to have a child after your friend has been pregnant -- ilovemyfamily

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You know those Facebook updates and tweets your friends are posting about their recent or upcoming pregnancy?

Don’t look at them in jealousy or disgust (not that you would anyway, of course). Those posts may mean you’re more likely to have a child soon, too.

A new paper from researchers at Bocconi University and the University of Groningen found the likeliness of women having kids increases when their friends are pregnant. In other words, fertility spreads among friends.

The researchers tracked the lives of more than 1,700 American women from when they were 12 to 15 years old until they were 30. They then watched their friend-forming habits and identified how much of an effect those friendships had on pregnancies.

“We show that the likelihood of a woman having a first child increases after a friend gives birth, reaches a peak approximately two years later, and then decreases,” the researchers said in a blog post. “The fact that the effect is not immediate is likely because it takes time to have a child, because there is a natural period before conception and because the desire to have a child develops over time.”

The graph below shows how over time the rate of pregnancy rises in the first year, peaks at two years, and then climbs back down. The numbers seen on the right side of the graphic are marriage rate numbers given by the researchers.

Read more at http://national.deseretnews.com/article/2887/Data-you-cant-ignore-Youre-more-likely-to-have-a-child-after-your-friend-has-been-pregnant.html#6H6V3jOex7SaqV2g.99