The orthopedic surgeon suggests a new therapy for your great aunt's condition that relies upon the administration of the hormone calcitonin. your relatives want to understand how this hormone works.

Calcitonin hormone is primarily involved in the production of bone. It lowers blood calcium and phosphorus by binding to osteoclasts and inhibits bone resorption in the kidneys. The inhibition of osteoclast reduce the amount of calcium release in the bloodstream thus producing an increase in bone mass. In addition, this is also use to relieve pain caused by spinal vertebra compression factures and in patients with arthritis.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."