If any bends or chinks can be felt, particularly towards the bottom of the sternum, then this is a positive sign that the calcium level received during its growing period was insufficient.

• 如果可以感觉到任何弯曲或裂口，特别是靠近胸骨的底部，那么这是一个积极的迹象表明，其生育期所需的钙水平不够。