骨骼科学博客 — Growing Years Science

Puberty has a wide normal window. Here is when it usually starts for girls and boys today, why girls hit their growth spurt first, and when to call the doctor.

Doctors don't only look at how tall a child is. They also look at how fast the child is growing. Here is what's typical, and why one reading can fool you.

The body's biggest growth hormone pulse comes soon after deep sleep starts. Here is how much sleep kids need, and what the research has not shown.

青少年对钙的需求量高于任何其他年龄段，且他们一生中绝大部分的骨骼都在 17 岁左右构建完成。以下是 1300 毫克钙的含量展示，以及为什么钙和铁不应同时摄入的原因。