9 Surprising Facts About Your Breasts

Your mind will be blown by these little known tidbits.

Bosom Buddies - You know you need to check them for lumps and that you like the way they look in your favorite bra, but your mind will be blown by these little-known breast facts. By Kenrya Rankin Naasel   (Photo: Jack Hollingsworth/Blend Images/Corbis)

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Bosom Buddies - You know you need to check them for lumps and that you like the way they look in your favorite bra, but your mind will be blown by these little-known breast facts. By Kenrya Rankin Naasel  (Photo: Jack Hollingsworth/Blend Images/Corbis)

Plan Ahead - There are a few bras that most women need. Figure out which ones you’re planning to buy before you head to the lingerie shop. In general, it’s good to have at least a couple black bras, a nude bra, a strapless/convertible and a sports bra for working out. And throw in something pretty for good measure. If you need a bra to fit a particular outfit, wear it or take it with you so you can try potential purchases on under the garment to check for coverage and fit issues.  (Photo: John Sciulli/Getty Images for Victoria's Secret)

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They Are Popping Up Earlier - These days, we start buying training bras at 9.86 years; that’s a full year earlier than back in 1991.  (Photo by John Sciulli/Getty Images for Victoria's Secret)

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They Are Getting Bigger - Twenty years ago, the average bra size was 34B. Today, it’s 34DD. (Photo: Ruth Jenkinson/Getty Images)

They Break Records - The world’s largest natural breasts belong to Annie Hawkins-Turner. She wears a 52I bra and they weigh 56 pounds each.  (Photo: Guinness World Records)

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They Break Records - The world’s largest natural breasts belong to Annie Hawkins-Turner. She wears a 52I bra and they weigh 56 pounds each.  (Photo: Guinness World Records)

Photo By Photo: Guinness World Records

They Are Unique - Whether they are small or huge, teardrop shaped or perky, there is not another pair out there exactly like yours. Think of them as your own totally hot snowflakes, each one different from the rest.  (Photo: Adrianna Williams/Corbis)

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But Most of Them Aren't That Heavy - The average breast weighs in at just over a pound. But they also change as much as a full cup size over the course of a month due to hormone fluctuations. (Photo: Adrianna Williams/Corbis)

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Your Left One Is Probably Bigger - For most women, one breast is larger than the other. On average, they differ by 39.7 milliliters. And for 65% of all women, it’s the left one that’s on swoll. They are noticeably asymmetrical for just 1 in 4 women. (Photo: Don Mason/Blend Images/Corbis)

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Breastfeeding Doesn't Jack Them Up - Contrary to popular belief, breastfeeding doesn’t make breasts sag. The expansion and contraction of milk glands that comes with pregnancy is actually the reason many women find that the shape of their breasts change after giving birth. However…  (Photo: KidStock/Getty Images) 

…Cigarettes Are Not Their Friends - Researchers have found that smoking cigarettes breaks down the elastin in breasts, which leaves them less supported and saggy.  (Photo by Daniel Barry/Getty Images)

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…Cigarettes Are Not Their Friends - Researchers have found that smoking cigarettes breaks down the elastin in breasts, which leaves them less supported and saggy.  (Photo by Daniel Barry/Getty Images)

Start With Your Comforter - Switching up your bedding is an easy way to begin updating your bedroom. And nowadays, you don’t have to spend an arm and a leg on duvet covers or comforters. You can go to Ikea, Marshall’s, Home Goods and other discount stores and find something amazing for an amazing price.   (Photo: BDLM/cultura/Corbis)

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Sleeping on Your Back Helps Them Stay Perky - Side sleeping leaves them unsupported and increases the chances of sagging, while sleeping on your stomach puts a ton of pressure on them, which can change their shape.  (Photo: BDLM/cultura/Corbis)