Most people don’t grow any taller after the age of 20, but a recent study published in the Journal of Orthopaedic Research found evidence that the pelvis — the hip bones — continues to widen in both men and women up to about age 80, long after skeletal growth is supposed to have stopped.

What age do women’s hips widen?

With the onset of puberty, the male pelvis remains on the same developmental trajectory, while the female pelvis develops in an entirely new direction, becoming wider and reaching its full width around the age of 25-30 years.

What causes hips to widen?

Pass it on: People’s hips get wider as they get older not just because of fat, but because their pelvic bones actually grow wider.

Puberty usually starts when you’re between 9 and 13 years old. But it can start earlier or later. Thanks to hormones like estrogen, you’ll notice changes like your breasts starting to grow and new curves forming on your body.