What is the disease name, according to description below :

- "Porous Bone"
- The bane of the old, especially women!
- The hard, rock-like quality of bone is dependent upon Calcium; however, when too much Ca is dissolved from bones or not enough replaced, bones lose density and are easily fractured
- Estrogen (Female Sex Hormone) helps to maintain proper Ca levels in bones
- Once the ovaries stop producing the hormone, women are at a higher risk of developing (...)
- A collapse of boney vertebrae of the spinal column results in loss of height and stooped posture
- Hip fractures are a common occurrence