What process forms a metamorphic rock

They are created by the physical/chemical alteration by heat and pressure of an existing igneous or sedimentary material into a more denser form.  (In other words, they are igneous or sedimentary rocks that have undergone changes as a result of extreme pressure and heat.)

"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."