Shakira was right--hips don't lie. That's the startling result of a study done at the University of Zurich on the size of a woman's pelvis. While scientists long theorized that women's hips were wider than men's because our large-headed babies needed the extra space to travel down the birth canal, they never suspected THIS was going on as women get older.
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Researchers found that after puberty, women's pelvic bones begin to get wider until they reach their widest point at age 25 to 30, or prime childbearing years. Then after age 40, the pelvis begins to shrink again.
Hormones, especially estrogen, fuel this change in hip-size: Estrogen levels rise after puberty and decrease as we get closer to menopause.
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Just think of it as Nature's way of upping the odds for an easier childbirth (though that doesn't always happen). And once the pelvis isn't needed for motherhood, it shrinks back to make it easier for us to walk--and maybe struggle less to try to get into our jeans!
PLUS: Click through the gallery below to see how celebrities have lost weight by making some simple changes.
The beloved singer's weight has fluctuated since she won American Idol, but she's gotten into kickboxing. That's her on the left in 2015 before getting pregnant with her second child, and on the right in October 2016.
Getty Images; Instagram