In Chinese medicine, fertility is ruled by the Kidneys. Often, infertility is a kidney deficiency, though this is not a rule since there are other causes. The bones are also ruled by the Kidney. In a rare moment of synchronicity, it seems Western biomedicine has found a link we have known about in Chinese medicine for 1000s of years. Our bones affect our hormones, bone density and fertility. When you apply a modern medical lens to Chinese medicine, we also see the connection between the Kidney Yin and hormones. What a coincidence! It’s all a lovely, tidy package.